There are many times I encountered an uncaught exception in android development, and it caused the thread to exit without further debugging information. Currently the message in my logcat looks like this:
10-24 21:06:56.762: W/dalvikvm(8806): threadid=25: thread exiting with uncaught exception (group=0x410a8438)
However when I searched on the internet trying to find how to debug similar messages, people typically posted something like"
04-25 19:35:02.353: W/dalvikvm(5650): threadid=1: thread exiting with uncaught exception (group=0x40a71930)
04-25 19:35:02.393: E/AndroidRuntime(5650): FATAL EXCEPTION: main
04-25 19:35:02.393: E/AndroidRuntime(5650): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.least/com.example.least.MainActivity}: android.os.NetworkOnMainThreadException
04-25 19:35:02.393: E/AndroidRuntime(5650): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
04-25 19:35:02.393: E/AndroidRuntime(5650): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
04-25 19:35:02.393: E/AndroidRuntime(5650): at android.app.ActivityThread.access$600(ActivityThread.java:141)
04-25 19:35:02.393: E/AndroidRuntime(5650): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
04-25 19:35:02.393: E/AndroidRuntime(5650): at android.os.Handler.dispatchMessage(Handler.java:99)
04-25 19:35:02.393: E/AndroidRuntime(5650): at android.os.Looper.loop(Looper.java:137)
04-25 19:35:02.393: E/AndroidRuntime(5650): at android.app.ActivityThread.main(ActivityThread.java:5041)
04-25 19:35:02.393: E/AndroidRuntime(5650): at java.lang.reflect.Method.invokeNative(Native Method)
04-25 19:35:02.393: E/AndroidRuntime(5650): at java.lang.reflect.Method.invoke(Method.java:511)
04-25 19:35:02.393: E/AndroidRuntime(5650): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
04-25 19:35:02.393: E/AndroidRuntime(5650): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
04-25 19:35:02.393: E/AndroidRuntime(5650): at dalvik.system.NativeStart.main(Native Method)
04-25 19:35:02.393: E/AndroidRuntime(5650): Caused by: android.os.NetworkOnMainThreadException
04-25 19:35:02.393: E/AndroidRuntime(5650): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117)
04-25 19:35:02.393: E/AndroidRuntime(5650): at java.net.InetAddress.lookupHostByName(InetAddress.java:385)
04-25 19:35:02.393: E/AndroidRuntime(5650): at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
04-25 19:35:02.393: E/AndroidRuntime(5650): at java.net.InetAddress.getAllByName(InetAddress.java:214)
04-25 19:35:02.393: E/AndroidRuntime(5650): at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:137)
04-25 19:35:02.393: E/AndroidRuntime(5650): at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
04-25 19:35:02.393: E/AndroidRuntime(5650): at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
The latter clearly contained more useful debugging information as typically suggested by this "Caused by" clause, whereas my logcat output did nothing but obfuscate the real problem underneath, despite the fact that I have already set the debug level to be verbose.
Is this a configuration problem? How can I configure my logcat to show something that's more suggestive?
Related
Keycloak run in Kubernetes via helm chart. With disabled SSL and enables StartTLS (it's our mail server requests) there is error:
14:26:54,545 ERROR [stderr] (default task-8) ... 84 more
14:26:54,545 ERROR [stderr] (default task-8) Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
14:26:54,545 ERROR [stderr] (default task-8) at java.base/sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:439)
14:26:54,545 ERROR [stderr] (default task-8) at java.base/sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:306)
14:26:54,545 ERROR [stderr] (default task-8) at java.base/sun.security.validator.Validator.validate(Validator.java:264)
14:26:54,545 ERROR [stderr] (default task-8) at java.base/sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:313)
14:26:54,545 ERROR [stderr] (default task-8) at java.base/sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:222)
14:26:54,545 ERROR [stderr] (default task-8) at java.base/sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:129)
14:26:54,545 ERROR [stderr] (default task-8) at java.base/sun.security.ssl.CertificateMessage$T12CertificateConsumer.checkServerCerts(CertificateMessage.java:629)
14:26:54,545 ERROR [stderr] (default task-8) ... 98 more
14:26:54,545 ERROR [stderr] (default task-8) Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
14:26:54,546 ERROR [stderr] (default task-8) at java.base/sun.security.provider.certpath.SunCertPathBuilder.build(SunCertPathBuilder.java:141)
14:26:54,546 ERROR [stderr] (default task-8) at java.base/sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:126)
14:26:54,546 ERROR [stderr] (default task-8) at java.base/java.security.cert.CertPathBuilder.build(CertPathBuilder.java:297)
14:26:54,546 ERROR [stderr] (default task-8) at java.base/sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:434)
14:26:54,546 ERROR [stderr] (default task-8) ... 104 more
14:26:54,547 ERROR [org.keycloak.services.resources.admin.RealmAdminResource] (default task-8) Failed to send email
javax.mail.MessagingException: Could not convert socket to TLS;
nested exception is:
javax.net.ssl.SSLHandshakeException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
Most probably the reason is, that the Java Virtual Machine (JVM) is not trusting your Mailservers Certificate (maybe self-signed?)
A solution can be to manually create a truststore containing this certificate
see multiple answers about creating a filling a truststore
e.g. How to import a .cer certificate into a java keystore?
This keystore now need to mounted into keycloak container and passed to the JVM as JAVA_OPTS parameter.
-Djavax.net.ssl.trustStore=/loc/in/container/truststore.jks
-Djavax.net.ssl.trustStorePassword=changeit
Depending on the helm chart you are using the solution varies.
E.g. with Codecentric-Keycloak Chart you set the JVM settings here
https://github.com/codecentric/helm-charts/tree/master/charts/keycloak#jvm-settings
and mount the keystore with help of extraVolumeMounts/extraVolumes
I am exporting HDFS data of departments_export file present in HDFS location /user/training/sqoop_import/departments_export directory. Followings are the records present in the file.
2,Fitness
3,Footwear
4,Apparel
5,Golf
6,Outdoors
7,Fan Shop
8,Development
1000,Admin
1001,Books
I want to export data to mysql table named departments_export(department_id int, department_name varchar). This table already contains following data
mysql> select * from departments_export;
+---------------+-----------------+
| department_id | department_name |
+---------------+-----------------+
| 2 | Fitness |
| 3 | Footwear |
| 4 | Apparel |
| 5 | Golf |
| 6 | Outdoors |
| 7 | Fan Shop |
| 8 | Development |
| 1000 | Admin |
+---------------+-----------------+
I am running below command for sqoop export
sqoop export \
--connect "jdbc:mysql://quickstart.cloudera:3306/retail_db" \
--username retail_dba \
--password cloudera \
--table departments_export \
--export-dir /user/training/sqoop_import/departments_export \
--batch \
-m 1 \
--update-key department_id \
--update-mode allowinsert \
I am getting below logs in command prompt.
Warning: /usr/lib/sqoop/../accumulo does not exist! Accumulo imports will fail.
Please set $ACCUMULO_HOME to the root of your Accumulo installation.
18/06/10 10:42:39 INFO sqoop.Sqoop: Running Sqoop version: 1.4.6-cdh5.13.0
18/06/10 10:42:40 WARN tool.BaseSqoopTool: Setting your password on the command-line is insecure. Consider using -P instead.
18/06/10 10:42:41 INFO manager.MySQLManager: Preparing to use a MySQL streaming resultset.
18/06/10 10:42:43 INFO tool.CodeGenTool: Beginning code generation
18/06/10 10:42:43 INFO manager.SqlManager: Executing SQL statement: SELECT t.* FROM `departments_export` AS t LIMIT 1
18/06/10 10:42:44 INFO manager.SqlManager: Executing SQL statement: SELECT t.* FROM `departments_export` AS t LIMIT 1
18/06/10 10:42:44 INFO orm.CompilationManager: HADOOP_MAPRED_HOME is /usr/lib/hadoop-mapreduce
Note: /tmp/sqoop-cloudera/compile/995860db956fe955c309e42de79ab4f9/departments_export.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
18/06/10 10:42:51 INFO orm.CompilationManager: Writing jar file: /tmp/sqoop-cloudera/compile/995860db956fe955c309e42de79ab4f9/departments_export.jar
18/06/10 10:42:51 INFO mapreduce.ExportJobBase: Beginning export of departments_export
18/06/10 10:42:51 INFO Configuration.deprecation: mapred.job.tracker is deprecated. Instead, use mapreduce.jobtracker.address
18/06/10 10:42:53 INFO Configuration.deprecation: mapred.jar is deprecated. Instead, use mapreduce.job.jar
18/06/10 10:42:57 INFO Configuration.deprecation: mapred.reduce.tasks.speculative.execution is deprecated. Instead, use mapreduce.reduce.speculative
18/06/10 10:42:57 INFO Configuration.deprecation: mapred.map.tasks.speculative.execution is deprecated. Instead, use mapreduce.map.speculative
18/06/10 10:42:57 INFO Configuration.deprecation: mapred.map.tasks is deprecated. Instead, use mapreduce.job.maps
18/06/10 10:42:57 INFO client.RMProxy: Connecting to ResourceManager at /0.0.0.0:8032
18/06/10 10:43:00 WARN hdfs.DFSClient: Caught exception
java.lang.InterruptedException
at java.lang.Object.wait(Native Method)
at java.lang.Thread.join(Thread.java:1281)
at java.lang.Thread.join(Thread.java:1355)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.closeResponder(DFSOutputStream.java:967)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.endBlock(DFSOutputStream.java:705)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:894)
18/06/10 10:43:00 WARN hdfs.DFSClient: Caught exception
java.lang.InterruptedException
at java.lang.Object.wait(Native Method)
at java.lang.Thread.join(Thread.java:1281)
at java.lang.Thread.join(Thread.java:1355)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.closeResponder(DFSOutputStream.java:967)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.endBlock(DFSOutputStream.java:705)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:894)
18/06/10 10:43:00 WARN hdfs.DFSClient: Caught exception
java.lang.InterruptedException
at java.lang.Object.wait(Native Method)
at java.lang.Thread.join(Thread.java:1281)
at java.lang.Thread.join(Thread.java:1355)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.closeResponder(DFSOutputStream.java:967)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.endBlock(DFSOutputStream.java:705)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:894)
18/06/10 10:43:01 WARN hdfs.DFSClient: Caught exception
java.lang.InterruptedException
at java.lang.Object.wait(Native Method)
at java.lang.Thread.join(Thread.java:1281)
at java.lang.Thread.join(Thread.java:1355)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.closeResponder(DFSOutputStream.java:967)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.endBlock(DFSOutputStream.java:705)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:894)
18/06/10 10:43:01 WARN hdfs.DFSClient: Caught exception
java.lang.InterruptedException
at java.lang.Object.wait(Native Method)
at java.lang.Thread.join(Thread.java:1281)
at java.lang.Thread.join(Thread.java:1355)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.closeResponder(DFSOutputStream.java:967)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.endBlock(DFSOutputStream.java:705)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:894)
18/06/10 10:43:01 WARN hdfs.DFSClient: Caught exception
java.lang.InterruptedException
at java.lang.Object.wait(Native Method)
at java.lang.Thread.join(Thread.java:1281)
at java.lang.Thread.join(Thread.java:1355)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.closeResponder(DFSOutputStream.java:967)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.endBlock(DFSOutputStream.java:705)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:894)
18/06/10 10:43:02 WARN hdfs.DFSClient: Caught exception
java.lang.InterruptedException
at java.lang.Object.wait(Native Method)
at java.lang.Thread.join(Thread.java:1281)
at java.lang.Thread.join(Thread.java:1355)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.closeResponder(DFSOutputStream.java:967)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.endBlock(DFSOutputStream.java:705)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:894)
18/06/10 10:43:02 WARN hdfs.DFSClient: Caught exception
java.lang.InterruptedException
at java.lang.Object.wait(Native Method)
at java.lang.Thread.join(Thread.java:1281)
at java.lang.Thread.join(Thread.java:1355)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.closeResponder(DFSOutputStream.java:967)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.endBlock(DFSOutputStream.java:705)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:894)
18/06/10 10:43:02 WARN hdfs.DFSClient: Caught exception
java.lang.InterruptedException
at java.lang.Object.wait(Native Method)
at java.lang.Thread.join(Thread.java:1281)
at java.lang.Thread.join(Thread.java:1355)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.closeResponder(DFSOutputStream.java:967)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.endBlock(DFSOutputStream.java:705)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:894)
18/06/10 10:43:02 WARN hdfs.DFSClient: Caught exception
java.lang.InterruptedException
at java.lang.Object.wait(Native Method)
at java.lang.Thread.join(Thread.java:1281)
at java.lang.Thread.join(Thread.java:1355)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.closeResponder(DFSOutputStream.java:967)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.endBlock(DFSOutputStream.java:705)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:894)
18/06/10 10:43:02 WARN hdfs.DFSClient: Caught exception
java.lang.InterruptedException
at java.lang.Object.wait(Native Method)
at java.lang.Thread.join(Thread.java:1281)
at java.lang.Thread.join(Thread.java:1355)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.closeResponder(DFSOutputStream.java:967)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.endBlock(DFSOutputStream.java:705)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:894)
18/06/10 10:43:03 WARN hdfs.DFSClient: Caught exception
java.lang.InterruptedException
at java.lang.Object.wait(Native Method)
at java.lang.Thread.join(Thread.java:1281)
at java.lang.Thread.join(Thread.java:1355)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.closeResponder(DFSOutputStream.java:967)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.endBlock(DFSOutputStream.java:705)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:894)
18/06/10 10:43:04 WARN hdfs.DFSClient: Caught exception
java.lang.InterruptedException
at java.lang.Object.wait(Native Method)
at java.lang.Thread.join(Thread.java:1281)
at java.lang.Thread.join(Thread.java:1355)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.closeResponder(DFSOutputStream.java:967)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.endBlock(DFSOutputStream.java:705)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:894)
18/06/10 10:43:04 INFO input.FileInputFormat: Total input paths to process : 1
18/06/10 10:43:04 INFO input.FileInputFormat: Total input paths to process : 1
18/06/10 10:43:04 WARN hdfs.DFSClient: Caught exception
java.lang.InterruptedException
at java.lang.Object.wait(Native Method)
at java.lang.Thread.join(Thread.java:1281)
at java.lang.Thread.join(Thread.java:1355)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.closeResponder(DFSOutputStream.java:967)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.endBlock(DFSOutputStream.java:705)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:894)
18/06/10 10:43:04 WARN hdfs.DFSClient: Caught exception
java.lang.InterruptedException
at java.lang.Object.wait(Native Method)
at java.lang.Thread.join(Thread.java:1281)
at java.lang.Thread.join(Thread.java:1355)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.closeResponder(DFSOutputStream.java:967)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.endBlock(DFSOutputStream.java:705)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:894)
18/06/10 10:43:04 INFO mapreduce.JobSubmitter: number of splits:1
18/06/10 10:43:04 INFO Configuration.deprecation: mapred.map.tasks.speculative.execution is deprecated. Instead, use mapreduce.map.speculative
18/06/10 10:43:05 INFO mapreduce.JobSubmitter: Submitting tokens for job: job_1527924460497_0039
18/06/10 10:43:06 INFO impl.YarnClientImpl: Submitted application application_1527924460497_0039
18/06/10 10:43:06 INFO mapreduce.Job: The url to track the job: http://quickstart.cloudera:8088/proxy/application_1527924460497_0039/
18/06/10 10:43:06 INFO mapreduce.Job: Running job: job_1527924460497_0039
18/06/10 10:43:33 INFO mapreduce.Job: Job job_1527924460497_0039 running in uber mode : false
18/06/10 10:43:33 INFO mapreduce.Job: map 0% reduce 0%
18/06/10 10:43:59 INFO mapreduce.Job: map 100% reduce 0%
18/06/10 10:43:59 INFO mapreduce.Job: Job job_1527924460497_0039 failed with state FAILED due to: Task failed task_1527924460497_0039_m_000000
Job failed as tasks failed. failedMaps:1 failedReduces:0
18/06/10 10:43:59 INFO mapreduce.Job: Counters: 8
Job Counters
Failed map tasks=1
Launched map tasks=1
Data-local map tasks=1
Total time spent by all maps in occupied slots (ms)=22735
Total time spent by all reduces in occupied slots (ms)=0
Total time spent by all map tasks (ms)=22735
Total vcore-milliseconds taken by all map tasks=22735
Total megabyte-milliseconds taken by all map tasks=23280640
18/06/10 10:43:59 WARN mapreduce.Counters: Group FileSystemCounters is deprecated. Use org.apache.hadoop.mapreduce.FileSystemCounter instead
18/06/10 10:43:59 INFO mapreduce.ExportJobBase: Transferred 0 bytes in 62.3015 seconds (0 bytes/sec)
18/06/10 10:43:59 WARN mapreduce.Counters: Group org.apache.hadoop.mapred.Task$Counter is deprecated. Use org.apache.hadoop.mapreduce.TaskCounter instead
18/06/10 10:43:59 INFO mapreduce.ExportJobBase: Exported 0 records.
18/06/10 10:43:59 ERROR tool.ExportTool: Error during export:
Export job failed!
at org.apache.sqoop.mapreduce.ExportJobBase.runExport(ExportJobBase.java:439)
at org.apache.sqoop.manager.SqlManager.updateTable(SqlManager.java:965)
at org.apache.sqoop.tool.ExportTool.exportTable(ExportTool.java:70)
at org.apache.sqoop.tool.ExportTool.run(ExportTool.java:99)
at org.apache.sqoop.Sqoop.run(Sqoop.java:147)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
at org.apache.sqoop.Sqoop.runSqoop(Sqoop.java:183)
at org.apache.sqoop.Sqoop.runTool(Sqoop.java:234)
at org.apache.sqoop.Sqoop.runTool(Sqoop.java:243)
at org.apache.sqoop.Sqoop.main(Sqoop.java:252)
Do you have primary key on departments_export table, if not create primary key for department_id.
Try this.
sqoop export \
--connect "jdbc:mysql://quickstart.cloudera:3306/retail_db" \
--username retail_dba \
--password cloudera \
--table departments_export \
--update-key department_id \
--update-mode allowinsert \
--export-dir /user/training/sqoop_import/departments_export/departments.txt \
--fields-terminated-by=','
-m 1 \
I have tried and it is working fine.
I am using Tomcat installed on Cent OS for creating JSP pages, but JDBC is not working.
I also moved mysql-connector-java-5.1.25-bin.jar into lib directory. The error in page shows:
Type Exception report
message javax.servlet.ServletException: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
description The server encountered an internal error that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: javax.servlet.ServletException: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:549)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:455)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
root cause
javax.servlet.ServletException: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:912)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:841)
org.apache.jsp.androidtest.db_005flogin.reg_jsp._jspService(reg_jsp.java:88)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
root cause
java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1714)
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1559)
org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:126)
org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:63)
java.lang.Class.forName0(Native Method)
java.lang.Class.forName(Class.java:190)
org.apache.jsp.androidtest.db_005flogin.reg_jsp._jspService(reg_jsp.java:74)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
I want to use sqoop-export from Hive => MySQL
I executed below command which worked:
sqoop-export --connect jdbc:mysql://localhost/mydb --table tbl_1 --export-dir /user/hive/warehouse/tbl_1 --username test --password test123
When I execute the command on my local machine it works. But when I try it on the server it does not.
Local machine: Ubuntu 12.10 with MySQL 5.5.28-0ubuntu0.12.10.2
Server: CentOS 5.6 with MySQL 5.0.95-log
Hadoop/Hive/Sqoop are of the same version.
I copied hadoop/hive/sqoop from my pc to server and both operating nicely on the server.
Creating table is operated correctly.
But why sqoop error?
Log is below.
sqoop-export --connect jdbc:mysql://localhost/honeybee --table tbl_1 --export-dir /user/hive/warehouse/tbl_1 --username test --password test123
Warning: /usr/lib/hbase does not exist! HBase imports will fail.
Please set $HBASE_HOME to the root of your HBase installation.
13/01/30 07:57:05 WARN tool.BaseSqoopTool: Setting your password on the command-line is insecure. Consider using -P instead.
13/01/30 07:57:05 INFO manager.MySQLManager: Preparing to use a MySQL streaming resultset.
13/01/30 07:57:05 INFO tool.CodeGenTool: Beginning code generation
13/01/30 07:57:05 INFO manager.SqlManager: Executing SQL statement: SELECT t.* FROM `tbl_1` AS t LIMIT 1
13/01/30 07:57:05 INFO manager.SqlManager: Executing SQL statement: SELECT t.* FROM `tbl_1` AS t LIMIT 1
13/01/30 07:57:05 INFO orm.CompilationManager: HADOOP_HOME is /home/hadoop-1.1.1/libexec/..
Note: /tmp/sqoop-root/compile/26876fd02da2baebf0e2db4e7ddb6ddd/tbl_1.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
13/01/30 07:57:07 INFO orm.CompilationManager: Writing jar file: /tmp/sqoop-root/compile/26876fd02da2baebf0e2db4e7ddb6ddd/tbl_1.jar
13/01/30 07:57:07 INFO mapreduce.ExportJobBase: Beginning export of tbl_1
13/01/30 07:57:08 INFO input.FileInputFormat: Total input paths to process : 1
13/01/30 07:57:08 INFO input.FileInputFormat: Total input paths to process : 1
13/01/30 07:57:08 INFO mapred.JobClient: Running job: job_201301300430_0033
13/01/30 07:57:09 INFO mapred.JobClient: map 0% reduce 0%
13/01/30 07:57:16 INFO mapred.JobClient: Task Id : attempt_201301300430_0033_m_000000_0, Status : FAILED
java.io.IOException: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
at org.apache.sqoop.mapreduce.ExportOutputFormat.getRecordWriter(ExportOutputFormat.java:79)
at org.apache.hadoop.mapred.MapTask$NewDirectOutputCollector.<init>(MapTask.java:628)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:753)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:370)
at org.apache.hadoop.mapred.Child$4.run(Child.java:255)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1136)
at org.apache.hadoop.mapred.Child.main(Child.java:249)
Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1117)
at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:350)
at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2408)
at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2445)
at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2230)
at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:813)
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:399)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:334)
at java.sql.DriverManager.getConnection(DriverManager.java:579)
at java.sql.DriverManager.getConnection(DriverManager.java:221)
at org.apache.sqoop.mapreduce.db.DBConfiguration.getConnection(DBConfiguration.java:184)
at org.apache.sqoop.mapreduce.AsyncSqlRecordWriter.<init>(AsyncSqlRecordWriter.java:76)
at org.apache.sqoop.mapreduce.ExportOutputFormat$ExportRecordWriter.<init>(ExportOutputFormat.java:95)
at org.apache.sqoop.mapreduce.ExportOutputFormat.getRecordWriter(ExportOutputFormat.java:77)
... 8 more
Caused by: java.net.ConnectException: Connection refused
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:391)
at java.net.Socket.connect(Socket.java:579)
at java.net.Socket.connect(Socket.java:528)
at java.net.Socket.<init>(Socket.java:425)
at java.net.Socket.<init>(Socket.java:241)
at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:259)
at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:300)
... 26 more
13/01/30 07:57:21 INFO mapred.JobClient: Task Id : attempt_201301300430_0033_m_000000_1, Status : FAILED
java.io.IOException: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
at org.apache.sqoop.mapreduce.ExportOutputFormat.getRecordWriter(ExportOutputFormat.java:79)
at org.apache.hadoop.mapred.MapTask$NewDirectOutputCollector.<init>(MapTask.java:628)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:753)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:370)
at org.apache.hadoop.mapred.Child$4.run(Child.java:255)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1136)
at org.apache.hadoop.mapred.Child.main(Child.java:249)
Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1117)
at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:350)
at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2408)
at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2445)
at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2230)
at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:813)
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:399)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:334)
at java.sql.DriverManager.getConnection(DriverManager.java:579)
at java.sql.DriverManager.getConnection(DriverManager.java:221)
at org.apache.sqoop.mapreduce.db.DBConfiguration.getConnection(DBConfiguration.java:184)
at org.apache.sqoop.mapreduce.AsyncSqlRecordWriter.<init>(AsyncSqlRecordWriter.java:76)
at org.apache.sqoop.mapreduce.ExportOutputFormat$ExportRecordWriter.<init>(ExportOutputFormat.java:95)
at org.apache.sqoop.mapreduce.ExportOutputFormat.getRecordWriter(ExportOutputFormat.java:77)
... 8 more
Caused by: java.net.ConnectException: Connection refused
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:391)
at java.net.Socket.connect(Socket.java:579)
at java.net.Socket.connect(Socket.java:528)
at java.net.Socket.<init>(Socket.java:425)
at java.net.Socket.<init>(Socket.java:241)
at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:259)
at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:300)
... 26 more
13/01/30 07:57:27 INFO mapred.JobClient: Task Id : attempt_201301300430_0033_m_000000_2, Status : FAILED
java.io.IOException: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
at org.apache.sqoop.mapreduce.ExportOutputFormat.getRecordWriter(ExportOutputFormat.java:79)
at org.apache.hadoop.mapred.MapTask$NewDirectOutputCollector.<init>(MapTask.java:628)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:753)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:370)
at org.apache.hadoop.mapred.Child$4.run(Child.java:255)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1136)
at org.apache.hadoop.mapred.Child.main(Child.java:249)
Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1117)
at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:350)
at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2408)
at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2445)
at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2230)
at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:813)
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:399)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:334)
at java.sql.DriverManager.getConnection(DriverManager.java:579)
at java.sql.DriverManager.getConnection(DriverManager.java:221)
at org.apache.sqoop.mapreduce.db.DBConfiguration.getConnection(DBConfiguration.java:184)
at org.apache.sqoop.mapreduce.AsyncSqlRecordWriter.<init>(AsyncSqlRecordWriter.java:76)
at org.apache.sqoop.mapreduce.ExportOutputFormat$ExportRecordWriter.<init>(ExportOutputFormat.java:95)
at org.apache.sqoop.mapreduce.ExportOutputFormat.getRecordWriter(ExportOutputFormat.java:77)
... 8 more
Caused by: java.net.ConnectException: Connection refused
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:391)
at java.net.Socket.connect(Socket.java:579)
at java.net.Socket.connect(Socket.java:528)
at java.net.Socket.<init>(Socket.java:425)
at java.net.Socket.<init>(Socket.java:241)
at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:259)
at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:300)
... 26 more
13/01/30 07:57:35 INFO mapred.JobClient: Job complete: job_201301300430_0033
13/01/30 07:57:35 INFO mapred.JobClient: Counters: 7
13/01/30 07:57:35 INFO mapred.JobClient: Job Counters
13/01/30 07:57:35 INFO mapred.JobClient: SLOTS_MILLIS_MAPS=22142
13/01/30 07:57:35 INFO mapred.JobClient: Total time spent by all reduces waiting after reserving slots (ms)=0
13/01/30 07:57:35 INFO mapred.JobClient: Total time spent by all maps waiting after reserving slots (ms)=0
13/01/30 07:57:35 INFO mapred.JobClient: Rack-local map tasks=4
13/01/30 07:57:35 INFO mapred.JobClient: Launched map tasks=4
13/01/30 07:57:35 INFO mapred.JobClient: SLOTS_MILLIS_REDUCES=0
13/01/30 07:57:35 INFO mapred.JobClient: Failed map tasks=1
13/01/30 07:57:35 INFO mapreduce.ExportJobBase: Transferred 0 bytes in 28.2556 seconds (0 bytes/sec)
13/01/30 07:57:35 INFO mapreduce.ExportJobBase: Exported 0 records.
13/01/30 07:57:35 ERROR tool.ExportTool: Error during export: Export job failed!
I solved this problem.
The problem is MySQL Remote Connection.
I used
sqoop-export --connect jdbc:mysql://localhost/mydb --table tbl_1 --export-dir /user/hive/warehouse/tbl_1 --username test --password test123
But it is wrong.
I should used hostname not localhost.
I learned one thing about sqoop through this problem.
Sqoop run MapReduce.
So Data node must be able access to MySQL on server.
(I installed MySQL on the name node.)
In addition, /etc/my.cnf
I comment out 'bind-address=127.0.0.1' & skip-networking
then it's working well.
I'm trying to customize my C3P0 settings to avoid the error shown at the bottom of this post.
It was suggested at this url --- http://make-it-open.blogspot.com/2008/12/sql-error-0-sqlstate-08s01.html --- to adjust the settings as follows:
In hibernate.cfg.xml, write
<property name="c3p0.min_size">5</property>
<property name="c3p0.max_size">20</property>
<property name="c3p0.timeout">1800</property>
<property name="c3p0.max_statements">50</property>
Then create "c3p0.properties" in your root classpath folder and write
c3p0.testConnectionOnCheckout=true
c3p0.acquireRetryDelay=1000
c3p0.acquireRetryAttempts=1
I've tried to make those adjustments following the direction of the Play! Framework documentation, where they say use "db.pool..." as follows:
db.pool.timeout=1800
db.pool.maxSize=15
db.pool.minSize=5
db.pool.initialSize=5
db.pool.acquireRetryAttempts=1
db.pool.preferredTestQuery=SELECT 1
db.pool.testConnectionOnCheckout=true
db.pool.acquireRetryDelay=1000
db.pool.maxStatements=50
Are those settings not going to work? Should I be trying to set them in a different way? With those settings I still get the error shown below, that is due to to long of a idle time.
Complete Stack Trace of Error:
23:00:44,932 WARN ~ SQL Error: 0, SQLState: 08S01
2012-04-13T23:00:44+00:00 app[web.1]: 23:00:44,932 ERROR ~ Communications link failure
2012-04-13T23:00:44+00:00 app[web.1]:
2012-04-13T23:00:44+00:00 app[web.1]: The last packet successfully received from the server was 274,847 milliseconds ago. The last packet sent successfully to the server was 7 milliseconds ago.
2012-04-13T23:00:44+00:00 app[web.1]: 23:00:44,934 ERROR ~ Why the driver complains here?
2012-04-13T23:00:44+00:00 app[web.1]: com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: No operations allowed after connection closed.Connection was implicitly closed by the driver.
2012-04-13T23:00:44+00:00 app[web.1]: at com.mysql.jdbc.Util.handleNewInstance(Util.java:407)
2012-04-13T23:00:44+00:00 app[web.1]: at com.mysql.jdbc.Util.getInstance(Util.java:382)
2012-04-13T23:00:44+00:00 app[web.1]: at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1013)
2012-04-13T23:00:44+00:00 app[web.1]: at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:987)
2012-04-13T23:00:44+00:00 app[web.1]: at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:982)
2012-04-13T23:00:44+00:00 app[web.1]: at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:927)
2012-04-13T23:00:44+00:00 app[web.1]: at com.mysql.jdbc.ConnectionImpl.throwConnectionClosedException(ConnectionImpl.java:1213)
2012-04-13T23:00:44+00:00 app[web.1]: at com.mysql.jdbc.ConnectionImpl.getMutex(ConnectionImpl.java:3101)
2012-04-13T23:00:44+00:00 app[web.1]: at com.mysql.jdbc.ConnectionImpl.setAutoCommit(ConnectionImpl.java:4975)
2012-04-13T23:00:44+00:00 app[web.1]: at org.hibernate.jdbc.BorrowedConnectionProxy.invoke(BorrowedConnectionProxy.java:74)
2012-04-13T23:00:44+00:00 app[web.1]: at $Proxy49.setAutoCommit(Unknown Source)
2012-04-13T23:00:44+00:00 app[web.1]: at play.db.jpa.JPAPlugin.closeTx(JPAPlugin.java:368)
2012-04-13T23:00:44+00:00 app[web.1]: at play.db.jpa.JPAPlugin.onInvocationException(JPAPlugin.java:328)
2012-04-13T23:00:44+00:00 app[web.1]: at play.plugins.PluginCollection.onInvocationException(PluginCollection.java:447)
2012-04-13T23:00:44+00:00 app[web.1]: at play.Invoker$Invocation.onException(Invoker.java:240)
2012-04-13T23:00:44+00:00 app[web.1]: at play.jobs.Job.onException(Job.java:124)
2012-04-13T23:00:44+00:00 app[web.1]: at play.jobs.Job.call(Job.java:163)
2012-04-13T23:00:44+00:00 app[web.1]: at play.jobs.Job$1.call(Job.java:66)
2012-04-13T23:00:44+00:00 app[web.1]: at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
2012-04-13T23:00:44+00:00 app[web.1]: at java.util.concurrent.FutureTask.run(FutureTask.java:166)
2012-04-13T23:00:44+00:00 app[web.1]: at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:165)
2012-04-13T23:00:44+00:00 app[web.1]: at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:266)
2012-04-13T23:00:44+00:00 app[web.1]: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
2012-04-13T23:00:44+00:00 app[web.1]: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
2012-04-13T23:00:44+00:00 app[web.1]: at java.lang.Thread.run(Thread.java:636)
2012-04-13T23:00:44+00:00 app[web.1]: Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
Create "c3p0.properties" inside 'conf' dir.
It works for me.
I think that 'db.pool' at application.conf only read a few options, take a look at play source code ( DBPlugin.onApplicationStart() ):
ComboPooledDataSource ds = new ComboPooledDataSource();
ds.setDriverClass(p.getProperty("db.driver"));
ds.setJdbcUrl(p.getProperty("db.url"));
ds.setUser(p.getProperty("db.user"));
ds.setPassword(p.getProperty("db.pass"));
ds.setAcquireRetryAttempts(10);
ds.setCheckoutTimeout(Integer.parseInt(p.getProperty("db.pool.timeout", "5000")));
ds.setBreakAfterAcquireFailure(false);
ds.setMaxPoolSize(Integer.parseInt(p.getProperty("db.pool.maxSize", "30")));
ds.setMinPoolSize(Integer.parseInt(p.getProperty("db.pool.minSize", "1")));
ds.setMaxIdleTimeExcessConnections(Integer.parseInt(p.getProperty("db.pool.maxIdleTimeExcessConnections", "0")));
ds.setIdleConnectionTestPeriod(10);
ds.setTestConnectionOnCheckin(true);
idleConnectionTestPeriod won't be picked up from c3p0.properties file. So you need to upgrade your play framework to 1.3 or 1.4