wso2 esb dblookup miss paramater - mysql

Question

I have set the variable before I use dplookup to select result,the paramater is:
mc.setProperty("year","2019");
mc.setProperty("month","11");
mc.setProperty("date","7");
the dblookup is
<dblookup>
<connection>
<pool>
<password>XXXX</password>
<driver>com.mysql.jdbc.Driver</driver>
<url>jdbc:mysql://XXXX</url>
<user>XXXX</user>
</pool>
</connection>
<statement>
<sql><![CDATA[
SELECT IFNULL(max(ID_),0) as MAX_ID_ FROM KETTLE WHERE YEAR(FROM_UNIXTIME(DETECTION_TIME_ / 1000)) = ? AND MONTH(FROM_UNIXTIME(DETECTION_TIME_ / 1000)) = ? AND DAYOFMONTH(FROM_UNIXTIME(DETECTION_TIME_ / 1000)) = ?;
]]></sql>
<parameter expression="get-property('year')" type="VARCHAR"/>
<parameter expression="get-property('month')" type="VARCHAR"/>
<parameter expression="get-property('date')" type="VARCHAR"/>
<result column="MAX_ID_" name="MAX_ID_"/>
</statement>
</dblookup>
Sometimes it works, sometimes it doesn't work
when success the log is:
TID: [-1234] [] [2019-11-07 15:11:40,072] DEBUG {org.apache.synapse.mediators.db.DBLookupMediator} - Setting as parameter : 1 value : 2019 as JDBC Type : 12(see java.sql.Types for valid types) {org.apache.synapse.mediators.db.DBLookupMediator}
TID: [-1234] [] [2019-11-07 15:11:40,073] DEBUG {org.apache.synapse.mediators.db.DBLookupMediator} - Setting as parameter : 2 value : 11 as JDBC Type : 12(see java.sql.Types for valid types) {org.apache.synapse.mediators.db.DBLookupMediator}
TID: [-1234] [] [2019-11-07 15:11:40,073] DEBUG {org.apache.synapse.mediators.db.DBLookupMediator} - Setting as parameter : 3 value : 7 as JDBC Type : 12(see java.sql.Types for valid types) {org.apache.synapse.mediators.db.DBLookupMediator}
TID: [-1234] [] [2019-11-07 15:11:40,073] DEBUG {org.apache.synapse.mediators.db.DBLookupMediator} - Successfully prepared statement :
SELECT IFNULL(max(ID_),0) as MAX_ID_ FROM KETTLE WHERE YEAR(FROM_UNIXTIME(DETECTION_TIME_ / 1000)) = ? AND MONTH(FROM_UNIXTIME(DETECTION_TIME_ / 1000)) = ? AND DAYOFMONTH(FROM_UNIXTIME(DETECTION_TIME_ / 1000)) = ?;
against DataSource : jdbc:XXXX{org.apache.synapse.mediators.db.DBLookupMediator}
TID: [-1234] [] [2019-11-07 15:11:40,235] DEBUG {org.apache.synapse.mediators.db.DBLookupMediator} - Processing the first row returned :
SELECT IFNULL(max(ID_),0) as MAX_ID_ FROM KETTLE WHERE YEAR(FROM_UNIXTIME(DETECTION_TIME_ / 1000)) = ? AND MONTH(FROM_UNIXTIME(DETECTION_TIME_ / 1000)) = ? AND DAYOFMONTH(FROM_UNIXTIME(DETECTION_TIME_ / 1000)) = ?;
{org.apache.synapse.mediators.db.DBLookupMediator}
TID: [-1234] [] [2019-11-07 15:11:40,235] DEBUG {org.apache.synapse.mediators.db.DBLookupMediator} - Column : MAX_ID_ returned value : 0 Setting this as the message property : MAX_ID_ {org.apache.synapse.mediators.db.DBLookupMediator}
when failure the log is:
TID: [-1234] [] [2019-11-07 09:29:50,073] DEBUG {org.apache.synapse.mediators.db.DBLookupMediator} - Getting a connection from DataSource jdbc:mysql://XXXX and preparing statement :
SELECT IFNULL(max(ID_),0) as MAX_ID_ FROM KETTLE WHERE YEAR(FROM_UNIXTIME(DETECTION_TIME_ / 1000)) = ? AND MONTH(FROM_UNIXTIME(DETECTION_TIME_ / 1000)) = ? AND DAYOFMONTH(FROM_UNIXTIME(DETECTION_TIME_ / 1000)) = ?;
{org.apache.synapse.mediators.db.DBLookupMediator}
TID: [-1234] [] [2019-11-07 09:29:50,074] DEBUG {org.apache.synapse.mediators.db.DBLookupMediator} - [ DB Connection : org.apache.commons.dbcp.PoolableConnection#1ff8a7ec ] {org.apache.synapse.mediators.db.DBLookupMediator}
TID: [-1234] [] [2019-11-07 09:29:50,075] DEBUG {org.apache.synapse.mediators.db.DBLookupMediator} - [ DB Connection instance identifier : 1ff8a7ec ] {org.apache.synapse.mediators.db.DBLookupMediator}
TID: [-1234] [] [2019-11-07 09:29:50,075] DEBUG {org.apache.synapse.mediators.db.DBLookupMediator} - [ Number of Active Connection : 1 ] {org.apache.synapse.mediators.db.DBLookupMediator}
TID: [-1234] [] [2019-11-07 09:29:50,075] DEBUG {org.apache.synapse.mediators.db.DBLookupMediator} - [ Number of Idle Connection : 0 ] {org.apache.synapse.mediators.db.DBLookupMediator}
TID: [-1234] [] [2019-11-07 09:29:50,075] DEBUG {org.apache.synapse.mediators.db.DBLookupMediator} - Setting as parameter : 1 value : 2019 as JDBC Type : 12(see java.sql.Types for valid types) {org.apache.synapse.mediators.db.DBLookupMediator}
TID: [-1234] [] [2019-11-07 09:29:50,075] ERROR {org.apache.synapse.mediators.db.DBLookupMediator} - SQL Exception occurred while executing statement :
SELECT IFNULL(max(ID_),0) as MAX_ID_ FROM KETTLE WHERE YEAR(FROM_UNIXTIME(DETECTION_TIME_ / 1000)) = ? AND MONTH(FROM_UNIXTIME(DETECTION_TIME_ / 1000)) = ? AND DAYOFMONTH(FROM_UNIXTIME(DETECTION_TIME_ / 1000)) = ?;
against DataSource : jdbc:mysql:XXXXX{org.apache.synapse.mediators.db.DBLookupMediator}
java.sql.SQLException: No operations allowed after statement closed.
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:964)