Re : Connection Closed Issue
Hi, I had a similar problem. I was using tomcat and mysql and configured a connection pool using dbcp. The problem was that after some hours the application starts to throw an exception. The exception was : communication link failure The reason is that mysql is destroying the connectionz after some time (8 hours by default) and the connection pool is not aware of that I replaced dbcp by c3p0 and defined the maxConnectionAge to 3600s and the problem was solved --- En date de : Mer 16.9.09, Sharath Babu S S S sharath.b...@solix.com a écrit : De: Sharath Babu S S S sharath.b...@solix.com Objet: Connection Closed Issue À: users@tomcat.apache.org Date: Mercredi 16 Septembre 2009, 11h52 Hi all, we are using Tomcat server 5.5.20. Database is 9.0.28. After starting tomcat and using our application after sometime we are getting the following error: Can anyone suggest me, its really very urgent Thread 78: SQLException While Purging the Selected Data From Source Table java.sql.SQLException: Connection oracle.jdbc.driver.t4cconnect...@1c9e95a is closed. for CONFIG 100019 For RUN_ID 100063 Debug: AJArchiveLogDetails.java Exception Occured While Inserting Data to AJArchiveLogDetails java.sql.SQLException: Connection oracle.jdbc.dr iver.t4cconnect...@1c9e95a is closed. Debug: insertToAJArchiveLogDetails() java.sql.SQLException: Connection oracle.jdbc.driver.t4cconnect...@1c9e95a is closed. at org.apache.tomcat.dbcp.dbcp.DelegatingConnection.checkOpen(DelegatingConnection.java:354) at org.apache.tomcat.dbcp.dbcp.DelegatingConnection.prepareStatement(DelegatingConnection.java:246) at org.apache.tomcat.dbcp.dbcp.PoolingDataSource$PoolGuardConnectionWrapper.prepareStatement(PoolingDataSource.java:302) at beans.AJArchiveLogDetails.insertToAJArchiveLogDetails(AJArchiveLogDetails.java:177) at beans.PurgeProcess_T.run(PurgeProcess_T.java:281) Debug: PurgeProcess_T.java: run() Thread 78: Exception While Updating the AJ_JOBS Table java.lang.Exception: java.sql.SQLException: Connection oracle.jdbc.driver.t4cconnect...@1c9e95a is closed. for CONFIG 100019 For RUN_ID 100063 Debug: PurgeProcess_T.java: run() Thread 78: Exception Releasing Resources java.sql.SQLException: Connection oracle.jdbc.driver.T4CConnection@ 1c9e95a is closed. for CONFIG 100019 For RUN_ID 100063 With Regards Sharat Babu Shravanam Byte and Switch Names Solix Technologies One of the Top 10 Startups to Watch Read More at http://www.solix.com/top10startups - CAUTION - Disclaimer * This e-mail contains PRIVILEGED AND CONFIDENTIAL INFORMATION intended solely for the use of the addressee(s). If you are not the intended recipient, please notify the sender by e-mail and delete the original message. Further, you are not to copy, disclose, or distribute this e-mail or its contents to any other person and any such actions are unlawful. This e-mail may contain viruses. Solix has taken every reasonable precaution to minimize this risk, but is not liable for any damage you may sustain as a result of any virus in this e-mail. You should carry out your own virus checks before opening the e-mail or attachment. Solix reserves the right to monitor and review the content of all messages sent to or from this e-mail address. Messages sent to or from this e-mail address may be stored on the Solix e-mail system. End of Disclaimer **
Re : How do I get hold of Tomcat JDBC pool lib
What about c3p0 ? --- En date de : Mer 16.9.09, Gaurav Lohiya gloh...@gmail.com a écrit : De: Gaurav Lohiya gloh...@gmail.com Objet: How do I get hold of Tomcat JDBC pool lib À: users@tomcat.apache.org Date: Mercredi 16 Septembre 2009, 17h18 Hi, I recently heard about the new Tomcat JDBC library, an alternative for the DBCP lib. We see concurrency issues with the DBCP lib and are desperately looking for a lib which can work in a highly concurrent application. Had some questions about this lib... 1. Can this library be used with Tomcat 5.0.25. (ya I know this version was used in the stone age :)) ) 2. Is there a general release available 3. Where can I get binaries / src for the latest build (GA or beta) Thanks in advance for your help. - Gaurav __ Do You Yahoo!? En finir avec le spam? Yahoo! Mail vous offre la meilleure protection possible contre les messages non sollicités http://mail.yahoo.fr Yahoo! Mail
Re: Re : Connection Closed Issue
Yes I defined the test query as well but it didn't fix the pb The issue was fixed with the maxConnectionAge parameter The exception was : # com.mysql.jdbc.CommunicationsException: Communications link failure due to underlying exception: # # ** BEGIN NESTED EXCEPTION ** # # java.net.SocketException # MESSAGE: Software caused connection abort: recv failed # # STACKTRACE: # # java.net.SocketException: Software caused connection abort: recv failed # at java.net.SocketInputStream.socketRead0(Native Method) # at java.net.SocketInputStream.read(Unknown Source) My first config with c3p0 was : bean id=dataSource class=com.mchange.v2.c3p0.ComboPooledDataSource property name=driverClass value=com.mysql.jdbc.Driver / property name=jdbcUrl value=jdbc:mysql://localhost:3306/mydb?relaxAutoCommit=trueamp;autoReconnect=true / property name=user value=user / property name=password value= / property name=initialPoolSize value=5 / property name=minPoolSize value=5 / property name=maxPoolSize value=20 / property name=checkoutTimeout value=1000/ property name=acquireIncrement value=1/ property name=testConnectionOnCheckin value=true/ property name=testConnectionOnCheckout value=true/ property name=preferredTestQuery value=SELECT 1/ property name=idleConnectionTestPeriod value=60/ /bean and now I added property name=maxConnectionAge value=3600/ --- En date de : Mer 16.9.09, Gaurav Lohiya gloh...@gmail.com a écrit : De: Gaurav Lohiya gloh...@gmail.com Objet: Re: Re : Connection Closed Issue À: Tomcat Users List users@tomcat.apache.org Date: Mercredi 16 Septembre 2009, 17h21 Do you have the validation query specified. I believe putting in the validation query should solve the problem. On Wed, Sep 16, 2009 at 11:17 AM, Chetouani kchet...@yahoo.fr wrote: Hi, I had a similar problem. I was using tomcat and mysql and configured a connection pool using dbcp. The problem was that after some hours the application starts to throw an exception. The exception was : communication link failure The reason is that mysql is destroying the connectionz after some time (8 hours by default) and the connection pool is not aware of that I replaced dbcp by c3p0 and defined the maxConnectionAge to 3600s and the problem was solved --- En date de : Mer 16.9.09, Sharath Babu S S S sharath.b...@solix.com a écrit : De: Sharath Babu S S S sharath.b...@solix.com Objet: Connection Closed Issue À: users@tomcat.apache.org Date: Mercredi 16 Septembre 2009, 11h52 Hi all, we are using Tomcat server 5.5.20. Database is 9.0.28. After starting tomcat and using our application after sometime we are getting the following error: Can anyone suggest me, its really very urgent Thread 78: SQLException While Purging the Selected Data From Source Table java.sql.SQLException: Connection oracle.jdbc.driver.t4cconnect...@1c9e95a is closed. for CONFIG 100019 For RUN_ID 100063 Debug: AJArchiveLogDetails.java Exception Occured While Inserting Data to AJArchiveLogDetails java.sql.SQLException: Connection oracle.jdbc.dr iver.t4cconnect...@1c9e95a is closed. Debug: insertToAJArchiveLogDetails() java.sql.SQLException: Connection oracle.jdbc.driver.t4cconnect...@1c9e95ais closed. at org.apache.tomcat.dbcp.dbcp.DelegatingConnection.checkOpen(DelegatingConnection.java:354) at org.apache.tomcat.dbcp.dbcp.DelegatingConnection.prepareStatement(DelegatingConnection.java:246) at org.apache.tomcat.dbcp.dbcp.PoolingDataSource$PoolGuardConnectionWrapper.prepareStatement(PoolingDataSource.java:302) at beans.AJArchiveLogDetails.insertToAJArchiveLogDetails(AJArchiveLogDetails.java:177) at beans.PurgeProcess_T.run(PurgeProcess_T.java:281) Debug: PurgeProcess_T.java: run() Thread 78: Exception While Updating the AJ_JOBS Table java.lang.Exception: java.sql.SQLException: Connection oracle.jdbc.driver.t4cconnect...@1c9e95a is closed. for CONFIG 100019 For RUN_ID 100063 Debug: PurgeProcess_T.java: run() Thread 78: Exception Releasing Resources java.sql.SQLException: Connection oracle.jdbc.driver.T4CConnection@ 1c9e95a is closed. for CONFIG 100019 For RUN_ID 100063 With Regards Sharat Babu Shravanam Byte and Switch Names Solix Technologies One of the Top 10 Startups to Watch Read More at http://www.solix.com/top10startups - CAUTION - Disclaimer * This e-mail contains PRIVILEGED AND CONFIDENTIAL INFORMATION intended solely for the use of the addressee(s). If you are not the intended recipient, please notify the sender by e-mail and delete the original message. Further, you are not to copy, disclose, or distribute this e-mail or its contents to any other person and any such actions are unlawful. This e
Re: tomcat mysql dbcp Communications link failure
Hi David,
Thanks for your answer.
At the moment I don't have the stack trace but it something like
# com.mysql.jdbc.CommunicationsException: Communications link failure due to
underlying exception:
#
# ** BEGIN NESTED EXCEPTION **
#
# java.net.SocketException
# MESSAGE: Software caused connection abort: recv failed
#
# STACKTRACE:
#
# java.net.SocketException: Software caused connection abort: recv failed
# at java.net.SocketInputStream.socketRead0(Native Method)
# at java.net.SocketInputStream.read(Unknown Source)
...
I was using dbcp and I changed to c3p0 beacause I read that with c3p0 we can
add paramters to test the connections
My config now is :
bean id=dataSource class=com.mchange.v2.c3p0.ComboPooledDataSource
property name=driverClass value=com.mysql.jdbc.Driver /
property name=jdbcUrl
value=jdbc:mysql://localhost:3306/mydb?relaxAutoCommit=trueamp;autoReconnect=true
/
property name=user value=user /
property name=password value= /
property name=initialPoolSize value=5 /
property name=minPoolSize value=5 /
property name=maxPoolSize value=20 /
property name=checkoutTimeout value=1000/
property name=acquireIncrement value=1/
property name=testConnectionOnCheckin value=true/
property name=testConnectionOnCheckout value=true/
property name=preferredTestQuery value=SELECT 1/
property name=idleConnectionTestPeriod value=60/
/bean
But I get the same error
I don't know exactly the time it takes but I didn't change anything in mysql so
I assume it's 8 hours (some hours at least). If you know how to change this
value...
I use spring, hibernate/jpa and I am not dealing with the connections at all. I
am just injecting the data source like this :
!-- Creates a EntityManagerFactory for use with the Hibernate JPA provider and
data source --
bean id=entityManagerFactory
class=org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean
property name=dataSource ref=dataSource /
property name=jpaVendorAdapter
bean class=org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter
/
/property
/bean
If you have an idea or questions...
Thanks for you help
--- En date de : Lun 14.9.09, David Smith d...@cornell.edu a écrit :
De: David Smith d...@cornell.edu
Objet: Re: tomcat mysql dbcp Communications link failure
À: Tomcat Users List users@tomcat.apache.org
Date: Lundi 14 Septembre 2009, 4h47
Could you provide the full stack trace? And if possible, can you
describe time it takes as it relates to the timeout of your MySQL
server? The default timeout in MySQL is 8 hours, but is configurable.
Also I'm assuming all the ${...} stuff is just you sanitizing the
Resource ... / block. One last question ... is there any chance your
code is holding on to connections as opposed to closing them when done?
Closing from the app's point of view is just returning the connection to
the pool for another request later.
--David
Chetouani wrote:
Hello guys,
If you can help with this problem.
I have an application deployed on tomcat V6.18. It uses a mysql database.
The problem is that after some hours the applicatiion throws an exception
when trying to connect to the data base.
com.mysql.jdbc.CommunicationsException: Communications link failure due to
underlying exception
I cofigured a data source using dbcp :
Resource name=jdbc/${database.datasource}
auth=Container
type=javax.sql.DataSource
factory=org.apache.commons.dbcp.BasicDataSourceFactory
driverClassName=${database.driver}
url=${database.url}
username=${database.user}
password=${database.password}
removeAbandoned=true
removeAbandonedTimeout=300
logAbandoned=true
maxActive=20
maxIdle=20
maxWait=1
validationQuery=SELECT 1
testOnBorrow=true
testOnReturn=true
testWhileIdle=true/
I did some searches and it seems that the problem is that the connection pool
keeps the connections for a long time even if they are considered dead by
mysql
So if you can help
Thanks
-
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tomcat mysql dbcp Communications link failure
Hello guys,
If you can help with this problem.
I have an application deployed on tomcat V6.18. It uses a mysql database.
The problem is that after some hours the applicatiion throws an exception when
trying to connect to the data base.
com.mysql.jdbc.CommunicationsException: Communications link failure due to
underlying exception
I cofigured a data source using dbcp :
Resource name=jdbc/${database.datasource}
auth=Container
type=javax.sql.DataSource
factory=org.apache.commons.dbcp.BasicDataSourceFactory
driverClassName=${database.driver}
url=${database.url}
username=${database.user}
password=${database.password}
removeAbandoned=true
removeAbandonedTimeout=300
logAbandoned=true
maxActive=20
maxIdle=20
maxWait=1
validationQuery=SELECT 1
testOnBorrow=true
testOnReturn=true
testWhileIdle=true/
I did some searches and it seems that the problem is that the connection pool
keeps the connections for a long time even if they are considered dead by mysql
So if you can help
Thanks
