Two things to do: * Create a JIRA ticket for this. We'll continue conversation and investigation there.
* Mount the source and step through one example transaction. See if you can verify that close isn't being called, and possibly why. * Finally, out of curiosity, disable caching globally, and see if the problem remains. I did find one refactoring that is in this area. I'll attempt to recreate and verify this too. Clinton 2010/5/5 François Schiettecatte <fschietteca...@gmail.com>: > Clinton > > A little more information on this, I reverted back to 240 and the problem I > reported did not occurs after a 24 hour run. I then went to the current > release and the problem reappeared, everything else is the same, so there is > an issue. > > What it looks like is going on is that connections are not being put back > into the connection pool after they are closed and so time out when they are > subsequently used by iBatis. MySQL is set to close connections after 60 > seconds and the pool is set to close them after being idle for 50 seconds. > Yet what I am seeing is that connections are being used quite some time after > the last packets have been sent over the wire: > > ### Error querying database. Cause: > com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link > failure > The last packet successfully received from the server was 60,858 milliseconds > ago. The last packet sent successfully to the server was 0 milliseconds ago. > ### The error may involve > dictionaries.Category.selectObjectByCategoryID-Inline > ### The error occurred while setting parameters > ### Cause: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: > Communications link failure > > What it feels like is that iBatis is hanging onto the connection and reusing > it at a later time. > > What do you need from me to track this down? > > Cheers > > François > > > > On May 1, 2010, at 4:28 PM, Clinton Begin wrote: > >> Then no, I don't believe there have been any changes related to >> connections or transactions between those versions. You can have a >> look at the change log if you like: >> >> https://issues.apache.org/jira/secure/BrowseProject.jspa?id=10601&subset=-1 >> >> Or the subversion history as well. >> >> Clinton >> >> 2010/5/1 François Schiettecatte <fschietteca...@gmail.com>: >>> I am using JDBC, with C3P0 as my data source. >>> >>> Cheers >>> François >>> >>> On May 1, 2010, at 4:14 PM, Clinton Begin wrote: >>> >>>> The only code changes related to that were with managed transactions. >>>> Which transacion manager are you using? (JDBC or MANAGED)? >>>> >>>> Cheers, >>>> Clinton >>>> >>>> 2010/5/1 François Schiettecatte <fschietteca...@gmail.com>: >>>>> Hi >>>>> >>>>> I grabbed the latest, greatest release of 3.0 from : >>>>> >>>>> >>>>> http://people.apache.org/builds/ibatis/ibatis-3-core/ibatis-core-3.0-bundle.zip >>>>> >>>>> and am now getting an exception from time to time, but I was not getting >>>>> it with the previous 3.0 beta release (240). I was wondering if there had >>>>> been any change in the code which deals with connections and pool between >>>>> those two releases. What it looks like to me is that connections are not >>>>> being returned to the pool after I close the SqlSession. I have mysql set >>>>> to timeout idle connections after 60 seconds and the connection pool to >>>>> time out idle connections after 50 seconds. Again this was not an issue >>>>> in 240. >>>>> >>>>> Any suggestions? >>>>> >>>>> Cheers >>>>> >>>>> François >>>>> >>>>> >>>>> 2010-05-01 01:54:20,609 [pool-1-thread-1] ERROR com.poplar.crawler.Worker >>>>> - >>>>> org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:8) >>>>> 2010-05-01 01:54:20,609 [pool-1-thread-1] ERROR com.poplar.crawler.Worker >>>>> - >>>>> org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:61) >>>>> 2010-05-01 01:54:20,609 [pool-1-thread-1] ERROR com.poplar.crawler.Worker >>>>> - >>>>> org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:53) >>>>> 2010-05-01 01:54:20,609 [pool-1-thread-1] ERROR com.poplar.crawler.Worker >>>>> - >>>>> org.apache.ibatis.session.defaults.DefaultSqlSession.selectOne(DefaultSqlSession.java:38) >>>>> 2010-05-01 01:54:20,609 [pool-1-thread-1] ERROR com.poplar.crawler.Worker >>>>> - com.poplar.sql.IBatis.selectObject(IBatis.java:554) >>>>> 2010-05-01 01:54:20,609 [pool-1-thread-1] ERROR com.poplar.crawler.Worker >>>>> - com.poplar.db.dictionaries.Category.fromCategoryName(Category.java:118) >>>>> 2010-05-01 01:54:20,609 [pool-1-thread-1] ERROR com.poplar.crawler.Worker >>>>> - com.poplar.db.items.ItemCategory.<init>(ItemCategory.java:201) >>>>> 2010-05-01 01:54:20,609 [pool-1-thread-1] ERROR com.poplar.crawler.Worker >>>>> - com.poplar.db.items.ItemCategory.<init>(ItemCategory.java:227) >>>>> 2010-05-01 01:54:20,609 [pool-1-thread-1] ERROR com.poplar.crawler.Worker >>>>> - com.poplar.db.items.Item.addItemCategory(Item.java:2182) >>>>> 2010-05-01 01:54:20,609 [pool-1-thread-1] ERROR com.poplar.crawler.Worker >>>>> - >>>>> com.poplar.crawler.processors.FeedProcessor.processEntryCategories(FeedProcessor.java:2494) >>>>> 2010-05-01 01:54:20,609 [pool-1-thread-1] ERROR com.poplar.crawler.Worker >>>>> - >>>>> com.poplar.crawler.processors.FeedProcessor.process(FeedProcessor.java:823) >>>>> 2010-05-01 01:54:20,609 [pool-1-thread-1] ERROR com.poplar.crawler.Worker >>>>> - com.poplar.crawler.Worker.crawl(Worker.java:1313) >>>>> 2010-05-01 01:54:20,609 [pool-1-thread-1] ERROR com.poplar.crawler.Worker >>>>> - com.poplar.crawler.Worker.crawlSourceKey(Worker.java:681) >>>>> 2010-05-01 01:54:20,609 [pool-1-thread-1] ERROR com.poplar.crawler.Worker >>>>> - com.poplar.crawler.Worker.run(Worker.java:591) >>>>> 2010-05-01 01:54:20,609 [pool-1-thread-1] ERROR com.poplar.crawler.Worker >>>>> - >>>>> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) >>>>> 2010-05-01 01:54:20,609 [pool-1-thread-1] ERROR com.poplar.crawler.Worker >>>>> - >>>>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) >>>>> 2010-05-01 01:54:20,609 [pool-1-thread-1] ERROR com.poplar.crawler.Worker >>>>> - java.lang.Thread.run(Thread.java:619) >>>>> 2010-05-01 01:54:20,609 [pool-1-thread-1] WARN com.poplar.crawler.Worker >>>>> - Failed to crawl the source key: >>>>> 'C01240E19154BE7BDA3703F726D5A68190D4A540', exception: >>>>> 'org.apache.ibatis.exceptions.IbatisException: >>>>> ### Error querying database. Cause: >>>>> com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications >>>>> link failure >>>>> >>>>> The last packet successfully received from the server was 104,024 >>>>> milliseconds ago. The last packet sent successfully to the server was 0 >>>>> milliseconds ago. >>>>> ### The error may involve >>>>> dictionaries.Category.selectObjectByCategoryName-Inline >>>>> ### The error occurred while setting parameters >>>>> ### Cause: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: >>>>> Communications link failure >>>>> >>>>> The last packet successfully received from the server was 104,024 >>>>> milliseconds ago. The last packet sent successfully to the server was 0 >>>>> milliseconds ago.'. >>>>> >>>>> >>>>> --------------------------------------------------------------------- >>>>> To unsubscribe, e-mail: user-java-unsubscr...@ibatis.apache.org >>>>> For additional commands, e-mail: user-java-h...@ibatis.apache.org >>>>> >>>>> >>>> >>>> --------------------------------------------------------------------- >>>> To unsubscribe, e-mail: user-java-unsubscr...@ibatis.apache.org >>>> For additional commands, e-mail: user-java-h...@ibatis.apache.org >>>> >>> >>> >>> --------------------------------------------------------------------- >>> To unsubscribe, e-mail: user-java-unsubscr...@ibatis.apache.org >>> For additional commands, e-mail: user-java-h...@ibatis.apache.org >>> >>> >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: user-java-unsubscr...@ibatis.apache.org >> For additional commands, e-mail: user-java-h...@ibatis.apache.org >> > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: user-java-unsubscr...@ibatis.apache.org > For additional commands, e-mail: user-java-h...@ibatis.apache.org > > --------------------------------------------------------------------- To unsubscribe, e-mail: user-java-unsubscr...@ibatis.apache.org For additional commands, e-mail: user-java-h...@ibatis.apache.org
