I have small web/mail server with apache/mariadb. Last week we changed some of the WWW code and to make it work I changed in php.ini line :
max_input_vars to 5000 (now 4000, it was 1000 at the start)
And it seems changed something because our mariadb 10.3.28 starts making problems.
It just stops reciving any information.
Restart of mysql (and httpd) helps for 24h now ...
Log:
2022-10-05 14:28:58 2796199 [Warning] Aborted connection 2796199 to db: 'ACTIVEDB' user: 'USER' host: 'localhost' (Got an error reading communication packets)
This kind of warnings shows up sometimes but now we got dozens every hour.
In PHP i decrased max_input_vars, in my.cnf I addedd
max_allowed_packet = 124M
max_connections = 400
log_warnings = 3
Everything was at default values before.
Log level was for some time at level 4 but it stared to get too big without any time give to "crush".
Disk is nvme 500GB, Intel and shows no problems.
I would like to hear :
how to check/connect mariadb when it looks inactive
what and how (step by step) to check
Thanks all
This is not an answer, but too long for a comment.
The error "Aborted connection ... (Got an error reading communication packets)" occurs if a client disconnected without sending a COM_CLOSE notification to the server before.
This behavior is easily reproducible, e.g. by starting the command line client and killing the command line client from another session. Depending on the log_warning level, the server will write a log entry and increase the server status variable aborted_clients (or aborted_connects if this happens during connection handshake).
Here are only a few possible reasons:
Before 10.2.3 the default log_warning level was 1 (no logging of aborted_connections), since 10.2.4 default value is 2 (log aborted connections) - if the server was recently upgraded from 10.2.3 or lower the problem may have already existed in previous installation, but was not written into log file.
The PHP script(s) doesn't close the connection: As soon the script is ready with its work, make sure that all transactions were committed, memory (result sets) were freed, and the connection was closed properly.
A timeout occurred, e.g. wait_timeout was set too low and exceeded or PHP's max_execution_time exceeded (and script was killed) or net_read/write_timeouts occurred.
DNS problems: In this case enable skip-name-resolve, use IP's and verify against IP's.
Network or firewall problems
I would like to thank for sugestions and your time.
Looks like there was a problem with one table, I don't know how/why but after some time it was set up as READ-ONLY. There was no information in log about it up to level 3 (level 4 generated too much information for me :( )
The DB works some time fine (expect for one table) and in time it looks like it just hangs whole DB.
The case is still "under investigation".
About "damaged" table :
listed and read-only related thinks works fine
insert/change hangs the whole DB for 2-3 minutes and then gets back to work
after few "hangs" the DB just freezes
there was nothing strange in logs level 3
copy table to new and then change names to switch tables works (I hope so)
If anyone have any idea how to check table would be great (standard operatinos like check, analyse did nothing).
Thanks again.
We use mediasoup to create our products. However, I am having problems with the transport connection.
The client transport connection state goes disconnected a few eights seconds after connection.
The following log will be output in the chrome console.
mediasoup-client:Transport connection state changed to connected
However, the following log will be output in the chrome console a few eights seconds later
mediasoup-client:Transport connection state changed to disconnected
If the NewProducer is present before the disconnection, the above will not happen.
Do you know the possible causes?
Resolved. I changed the AWS security policy according to the topic below and it worked.
You’ll also need to configure your AWS Security Group to allow TCP/UDP on whatever port range you’re using.
https://mediasoup.discourse.group/t/docker-setup-with-listenips/2557/4
I've a MySQL 5.1.41 Server installed on a Ubuntu machine. I get connected to it through Workbench from my Windows machine over TCP/IP. I run a bigger query, after 900 seconds I got the below message, (there is no wait_timeout defined in the server's configuration file my.cnf)
Error Code: 2013. Lost connection to MySQL server during query
But when I look into the process list by using show processlist; command, I can still see my query running.
I got this link http://dev.mysql.com/doc/refman/5.0/en/gone-away.html where I found the below lines,
The problem on Windows is that in some cases MySQL does not get an
error from the OS when writing to the TCP/IP connection to the server,
but instead gets the error when trying to read the answer from the
connection.
I'm not sure whether this is the reason for my observation.
Please clarify me on this.
Thanks in advance!!
Closing connection is not a reason to stop a query. A query might be update, or kind of transaction, or select with output to remote (server) file.
Closed connection is just is just means, that you will not receive any data from DBMS after executing query (data, timings - nothing).
The reason of closing connection could be different, as SO-User posted. Try increasing
on server side:
wait_timeout
max_allowed_packet
on client side:
any kinds of timeout you find in your client (i.e. that SO-User suggests)
Do not forget to reload DBMS config and restart client (for sure)
In MySQL WorkBench we have an option to change timeout.
Find it under
Edit → Preferences → SQL Editor → DBMS connection read time out (in seconds): 600
Changed the value to 6000 or something higher.
Update
Lost connection to MySQL server
There are three likely causes for this error message.
Usually it indicates network connectivity trouble and you should check
the condition of your network if this error occurs frequently. If the
error message includes “during query,” this is probably the case you
are experiencing.
Sometimes the “during query” form happens when millions of rows are
being sent as part of one or more queries. If you know that this is
happening, you should try increasing net_read_timeout from its default
of 30 seconds to 60 seconds or longer, sufficient for the data
transfer to complete.
More rarely, it can happen when the client is attempting the initial
connection to the server. In this case, if your connect_timeout value
is set to only a few seconds, you may be able to resolve the problem
by increasing it to ten seconds, perhaps more if you have a very long
distance or slow connection. You can determine whether you are
experiencing this more uncommon cause by using SHOW GLOBAL STATUS LIKE
'Aborted_connects'. It will increase by one for each initial
connection attempt that the server aborts. You may see “reading
authorization packet” as part of the error message; if so, that also
suggests that this is the solution that you need.
If the cause is none of those just described, you may be experiencing
a problem with BLOB values that are larger than max_allowed_packet,
which can cause this error with some clients. Sometime you may see an
ER_NET_PACKET_TOO_LARGE error, and that confirms that you need to
increase max_allowed_packet.
Doc link: Error lost connection
and also check here
I'm running a MsAccess with Mysql background database and today I am experiencing some problems.
Depending on how far I can get into the program I am able to get a list of all the names and entry. But once I go into the edit form of any entry I get a variety of results. Sometimes I am lucky and I can see the first entry. But any entry after that will always get a MsAccess error: Object invalid or no longer set and then any subsequent calls after will yield a Mysql ODBC error of Mysql server has gone away.
I've looked around at several websites and even all the stack overflow sites with the same question and I've tried a variety of solutions. (Keep in mind that this database has been running for years and this is the first time I am getting this message) It also takes about 2m14s to 2m59s before it displays any error messages.
Here is what I tried so far:
I've tried changing a few of the ODBC connection settings.
Checked Allow Big Results - FAILED
Checked Enable Auto Reconnect - FAILED
I've Checked and repaired tables - FAILED
A good number of tables resulted in, "table needs update please repair table"
I've Doubled the numbers in the my.cnf configuration and restarted the mysql service as well as the msaccess software. FAILED
These were the settings of my my.cnf after I made the changes.
Here:
set-variable = max_connections=500
safe-show-database
log-error=/var/log/mysqld.log
connect_timeout=1000
interactive_timeout=28800
wait_timeout=288000 <**This was changed**
join_buffer_size=6M
key_buffer_size=300M <**THIS WAS CHANGED **
max_allowed_packet=300M <**THIS WAS CHANGED **
myisam_sort_buffer_size=300M <**THIS WAS CHANGED **
read_buffer_size=6M
sort_buffer_size=6M
table_cache=12288
thread_cache_size=24
tmp_table_size=132M
query_cache_limit=3M
query_cache_size=64M
query_cache_type=1
Basically I've tried every suggestion I could find so far and I can't seem to figure out the problem.
I've also had a look at MYSQL: Has gone away
If I go through the bulleted list there
Nobody has killed the running thread
I don't think the query was ran after the connection was closed (since it ran for years fine)
Client application does have the privileges needed
I don't know how to figure out if I had a timeout from the TCP/IP connection on client side
I don't know if I've encounted a timeout on the server side, but I do know that automatic reconnection in client is disabled
???
The query could potentially be large since it is a form with many subforms
???
DNS should be ok, since I can connect to it with a real sql viewer (HeidiSQL)
???Child forks???
???
I think this is one of those bugs that is hard to figure out since I'm exhausted :/ I'm probably missing some info but I am not sure what else to include.
---EDIT---
Thank you all for your comments, I'm still debugging this issue. It seems that it's not all the forms that are causing some issues. So I'm starting to think that this is a MSAccess issue more than it is an MySql issue. The forms that do break all have the same line in their VBA code:
Private Sub Form_Error(DataErr As Integer, Response As Integer)
If Screen.ActiveControl.Name = "UnboundTextBox" Then
Response = acDataErrContinue
End If
End Sub
I don't recall putting this code in, so I assume it's an automatic thing, but I'm still going through all my forms to see which ones cause this error and which do not. So more in a few.
---Today I'm doing some debugging trying to find whatever I can from whatever log I can muster ----
MSACCESS 17ec-b10 EXIT SQLStatisticsW with return code -1 (SQL_ERROR)
HSTMT 0AF82920
WCHAR * 0x00000000 [ -3] <empty string>
SWORD -3
WCHAR * 0x00000000 [ -3] <empty string>
SWORD -3
WCHAR * 0x0013AAE8 [ -3] "location\ 0"
SWORD -3
UWORD 1 <SQL_INDEX_ALL>
UWORD 0 <SQL_QUICK>
DIAG [08S01] [MySQL][ODBC 3.51 Driver][mysqld-5.0.92-community]Lost
connection to MySQL server during query (2013)
----------------------------- FINAL EDIT --------------------------
The past week or so, my boss has been working hard to install a new internal server for our office. We also switched IPs several times and ISP providers. Turns out, as a result he created for me an administrative nightmare, as I attempted to debug issues with the server, and issues with the software ect.. ect.. when the issue was in the settings the ISP providers established with the router settings etc... etc... SO basically this whole headache was nothing wrong with server, nor software but hardware inbetween.
So now, I have to backwards engineer everything I did and try to get it to work on both ips. It works on the important one now. But it's not working on the old one so... I guess I just have to figure that out. [Waving imaginary fist in the air] Lol
The problem is that the connection is timing out. This is not a setting that you can change at the ODBC level. My MySQL provider had set the timeout at 30 seconds (you can find out what yours is set at my running the PassThrough query "SELECT ##wait_timeout"). I got round it by polling the connection every 10 seconds with a simple form. That keeps the connection alive. Make sure you have an AutoExec macro which opens the form.
Private Sub Form_Open(Cancel As Integer)
Me.TimerInterval = 1000 ' 10 seconds
End Sub
Private Sub Form_Timer()
Me.Requery
End Sub
I have not used MySQL with Access in a production environment, but the problem you are having sounds suspiciously similar to one I've encountered with SQL Server. Basically, if the client workstation has incorrect DNS settings, it can get confused about how to resolve the connection to the SQL Server and lose the connection. In the cases where I've encountered this, the workstations were incorrectly configured with the Internet provider's DNS as primary DSN, but the SQL Server was a local server, available only on the local LAN (and not mapped by the ISPs DNS).
The solution is to use the local domain controller as the primary DNS. It will look up the local SQL Server's IP and pass off any non-local lookups to the Internet provider's DNS.
If you don't have a Windows/Samba domain controller, then you need to use whatever the local LAN's authorative name server is. Alternatively, you could connect to the MySQL server by IP address and avoid the problem, or map it in the client workstation's HOSTS file (which is not recommended -- it's a great way to cause really hard to troubleshoot problems when the IP addresses change).
[mysqld-5.0.92-community]Lost
connection to MySQL server during query (2013)
This genary means you have found a bug in MySQL-Server
can you post a tail of your mysqld.err and mysqd.log
this makes the server restart and will effectefly shut down all open connections
Closed. This question is not reproducible or was caused by typos. It is not currently accepting answers.
This question was caused by a typo or a problem that can no longer be reproduced. While similar questions may be on-topic here, this one was resolved in a way less likely to help future readers.
Closed 6 years ago.
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I'm getting a SQL Server error:
A transport-level error has occurred
when receiving results from the
server. (provider: Shared Memory
Provider, error: 0 - The handle is
invalid.)
I'm running Sql Server 2008 SP1, Windows 2008 Standard 64 bit.
It's a .Net 4.0 web application. It happens when a request is made to the server. It's intermittent. Any idea how I can resolve it?
The database connection is closed by the database server. The connection remains valid in the connection pool of your app; as a result, when you pickup the shared connection string and try to execute it's not able to reach the database. If you are developing Visual Studio, simply close the temporary web server on your task bar.
If it happens in production, resetting your application pool for your web site should recycle the connection pool.
Try the following command on the command prompt:
netsh interface tcp set global autotuning=disabled
This turns off the auto scaling abilities of the network stack
I had the same problem. I restarted Visual Studio and that fixed the problem
Transport level errors are often linked to the connection to sql server being broken ... usually network.
Timeout Expired is usually thrown when a sql query takes too long to run.
So few options can be :
Check for the connection in VPN (if used) or any other tool
Restart IIS
Restart machine
Optimize sql queries.
For those not using IIS, I had this issue when debugging with Visual Studio 2010. I ended all of the debugger processes: WebDev.WebServer40.EXE which solved the issue.
All you need is to Stop the ASP.NET Development Server and run the project again
If you are connected to your database via Microsoft SQL Server Management, close all your connections and retry.
Had this error when connected to another Azure Database, and worked for me when closed it.
Still don't know why ..
Look at the MSDN blog which details out this error:
Removing Connections
The connection pooler removes a connection from the pool after it has
been idle for a long time, or if the pooler detects that the
connection with the server has been severed.
Note that a severed connection can be detected only after attempting
to communicate with the server. If a connection is found that is no
longer connected to the server, it is marked as invalid.
Invalid connections are removed from the connection pool only when
they are closed or reclaimed.
If a connection exists to a server that has disappeared, this
connection can be drawn from the pool even if the connection pooler
has not detected the severed connection and marked it as invalid.
This is the case because the overhead of checking that the connection
is still valid would eliminate the benefits of having a pooler by
causing another round trip to the server to occur.
When this occurs, the first attempt to use the connection will detect
that the connection has been severed, and an exception is thrown.
Basically what you are seeing is that exception in the last sentence.
A connection is taken from the connection pool, the application does
not know that the physical connection is gone, an attempt to use it is
done under the assumption that the physical connection is still there.
And you get your exception.
There are a few common reasons for this.
The server has been restarted, this will close the existing connections.
In this case, have a look at the SQL Server log, usually found at:
C:\Program Files\Microsoft SQL Server\\MSSQL\LOG
If the timestamp for startup is very recent, then we can suspect that
this is what caused the error. Try to correlate this timestamp with
the time of exception.
2009-04-16 11:32:15.62 Server Logging SQL Server messages in file
‘C:\Program Files\Microsoft SQL Server\MSSQL.1\MSSQL\LOG\ERRORLOG’.
Someone or something has killed the SPID that is being used.
Again, take a look in the SQL Server log. If you find a kill, try to
correlate this timestamp with the time of exception.
2009-04-16 11:34:09.57 spidXX Process ID XX was killed by
hostname xxxxx, host process ID XXXX.
There is a failover (in a mirror setup for example) again, take a look in the SQL Server log.
If there is a failover, try to correlate this timestamp with the time
of exception.
2009-04-16 11:35:12.93 spidXX The mirrored database “” is changing roles from “PRINCIPAL” to “MIRROR” due to
Failover.
Was getting this, always after about 5 minutes of operation. Investigated and found that a warning from e1iexpress always occurred before the failure. This apparently is an error having to do with certain TCP/IP adapters. But changing from WiFi to hardwired didn't affect it.
So tried Plan B and restarted Visual Studio. Then it worked fine.
On closer study I noticed that, when working correctly, the message The Thread '<No Name>' has exited with code 0 occurred at almost exactly the time the run crashed in previous attempts. Some Googling reveals that that message comes up when (among other things) the server is trimming the thread pool.
Presumably there was a bogus thread in the thread pool and every time the server attempted to "trim" it it took the app down.
You get this message when your script make SQL Service stopped for some reasons. so if you start SQL Service again perhaps your problem will be resolved.
I know this may not help everyone (who knows, maybe yes), but I had the same problem and after some time, we realized that the cause was something out of the code itself.
The computer trying to reach the server, was in another network, the connection could be established but then dropped.
The way we used to fix it, was to add a static route to the computer, allowing direct access to the server without passing thru the firewall.
route add –p YourServerNetwork mask NetworkMask Router
Sample:
route add –p 172.16.12.0 mask 255.255.255.0 192.168.11.2
I hope it helps someone, it's better to have this, at least as a clue, so if you face it, you know how to solve it.
I got the same error in Visual Studion 2012 development environment, stopped the IIS Express and rerun the application, it started working.
I had the same issue. I solved it, truncating the SQL Server LOG.
Check doing that, and then tell us, if this solution helped you.
For me the solution was totally different.
In my case I had an objectsource which required a datetimestamp parameter. Even though that ODS parameter ConvertEmptyStringToNull was true 1/1/0001 was being passed to SelectMethod. That in turn caused a sql datetime overflow exception when that datetime was passed to the sql server.
Added an additional check for datetime.year != 0001 and that solved it for me.
Weird that it would throw a transport level error and not a datetime overflow error.
Anyways..
In my case the "SQL Server" Server service stopped. When I restarted the service that enabled me to run the query and eliminate the error.
Its also a good idea to examine your query to find out why the query made this service stop
For me the answer is to upgrade the OS from 2008R2 to 2012R2, the solution of iisreset or restart apppool didn't work for me.
I also tried to turn of TCP Chimney Offload setting, but I didn't restart the server because it is a production server, which didn't work either.
We encountered this error recently between our business server and our database server.
The solution for us was to disable "IP Offloading" on the network interfaces.
Then the error went away.
One of the reason I found for this error is 'Packet Size=xxxxx' in connection string. if the value of xxxx is too large, we will see this error. Either remove this value and let SQL server handle it or keep it low, depending on the network capabilities.
It happened to me when I was trying to restore a SQL database and checked following Check Box in Options tab,
As it's a stand alone database server just closing down SSMS and reopening it solved the issue for me.
This occurs when the database is dropped and re-created some shared resources is still considering the database still exists, so when you re-run execute query to create tables in the database after it was re-created the error will not show again and Command(s) completed successfully. message will show instead of the error message Msg 233, Level 20, State 0, Line 0 A transport-level error has occurred when sending the request to the server. (provider: Shared Memory Provider, error: 0 - No process is on the other end of the pipe.).
Simply ignore this error when you are dropping and recreating databases and re-execute your DDL queries with no worries.
I faced the same issue recently, but i was not able to get answer in google.
So thought of sharing it here, so that it can help someone in future.
Error:
While executing query the query will provide few output then it will throw below error.
"Transport level error has occurred when receiving output from
server(TCP:provider,error:0- specified network name is no longer
available"
Solution:
Check the provider of that linked server
In that provider properties ,Enable "Allow inprocess" option for that particular provider to fix the issue.