Jira サーバーで処理に失敗し、ログにコネクション プールのエラーが記録される
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問題
My JIRA application is unable to function during certain operations.
atlassian-jira.log に次のエラーが返される。
2015-01-20 12:27:11,903 localhost-startStop-1 ERROR [NoModule] There was an error getting a DBCP datasource.
java.lang.RuntimeException: Unable to obtain a connection from the underlying connection pool
at org.ofbiz.core.entity.jdbc.interceptors.connection.ConnectionTracker.trackConnection(ConnectionTracker.java:59)
at org.ofbiz.core.entity.transaction.DBCPConnectionFactory.trackConnection(DBCPConnectionFactory.java:242)
at org.ofbiz.core.entity.transaction.DBCPConnectionFactory.getConnection(DBCPConnectionFactory.java:73)
at org.ofbiz.core.entity.ConnectionFactory.tryGenericConnectionSources(ConnectionFactory.java:69)
at org.ofbiz.core.entity.transaction.JNDIFactory.getConnection(JNDIFactory.java:146)
at org.ofbiz.core.entity.TransactionFactory.getConnection(TransactionFactory.java:101)
at org.ofbiz.core.entity.ConnectionFactory.getConnection(ConnectionFactory.java:59)
at org.ofbiz.core.entity.jdbc.SQLProcessor.getConnection(SQLProcessor.java:367)
at org.ofbiz.core.entity.jdbc.SQLProcessor.prepareStatement(SQLProcessor.java:515)
at org.ofbiz.core.entity.GenericDAO.selectListIteratorByCondition(GenericDAO.java:844)
at org.ofbiz.core.entity.GenericDAO.selectByCondition(GenericDAO.java:793)
at org.ofbiz.core.entity.GenericDAO.selectByCondition(GenericDAO.java:772)
at org.ofbiz.core.entity.GenericHelperDAO.findByCondition(GenericHelperDAO.java:178)
at org.ofbiz.core.entity.GenericDelegator.findByCondition(GenericDelegator.java:1083)
at com.atlassian.jira.propertyset.CachingOfBizPropertyEntryStore$EntryLoader.load(CachingOfBizPropertyEntryStore.java:512)
at com.atlassian.jira.propertyset.CachingOfBizPropertyEntryStore$EntryLoader.load(CachingOfBizPropertyEntryStore.java:505)
at com.atlassian.cache.memory.MemoryCacheManager$3$1.load(MemoryCacheManager.java:132)
...
Caused by: java.sql.SQLException: I/O Error: Connection reset
at net.sourceforge.jtds.jdbc.TdsCore.nextToken(TdsCore.java:2311)
at net.sourceforge.jtds.jdbc.TdsCore.login(TdsCore.java:603)
at net.sourceforge.jtds.jdbc.ConnectionJDBC2.<init>(ConnectionJDBC2.java:357)
at net.sourceforge.jtds.jdbc.ConnectionJDBC3.<init>(ConnectionJDBC3.java:50)
at net.sourceforge.jtds.jdbc.Driver.connect(Driver.java:184)
...
Caused by: java.net.SocketException: Connection reset
at java.net.SocketInputStream.read(Unknown Source)
at java.net.SocketInputStream.read(Unknown Source)
at java.io.DataInputStream.readFully(Unknown Source)
at java.io.DataInputStream.readFully(Unknown Source)
at net.sourceforge.jtds.jdbc.SharedSocket.readPacket(SharedSocket.java:842)
at net.sourceforge.jtds.jdbc.SharedSocket.getNetPacket(SharedSocket.java:723)
at net.sourceforge.jtds.jdbc.ResponseStream.getPacket(ResponseStream.java:466)
at net.sourceforge.jtds.jdbc.ResponseStream.read(ResponseStream.java:103)
at net.sourceforge.jtds.jdbc.TdsCore.nextToken(TdsCore.java:2206)
...
診断
There are a number of different exceptions that cause the "Unable to obtain a connection from the underlying connection pool" error message to be displayed. Take a look in the 'Caused by' section of the stack traces in the atlassian-jira.log, in this scenario the stack traces will mention connection resets. Specifically above this is java.net.SocketException: Connection reset.
There are other problems that can provide the same error message such as Operations in Jira server fail with connection pool errors in logs.
原因
When a database server reboots or a network failure has occurred, all connections in the database connection pool are broken, and JIRA would normally need restarting to recreate those connections. There are some further information on this within Surviving Connection Closures documentation. This can also be caused by network problems, such as a firewall refusing entry to the server or a piece of network hardware not working.
ソリューション
Ensure that the validation query is set as described in Surviving Connection Closures. If the connection pool is timing out waiting for an idle object, this is a different error and is described in Operations in Jira server fail with connection pool errors in logs, including how to fix.