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https://issues.apache.org/jira/browse/FALCON-1716?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15106666#comment-15106666
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pavan kumar kolamuri commented on FALCON-1716:
----------------------------------------------
I am not putting this on review board since it is very small patch. Please
review
> API fails with CommunicationsException when mysql interaction time is longer
> than 53,434,939 milliseconds
> ---------------------------------------------------------------------------------------------------------
>
> Key: FALCON-1716
> URL: https://issues.apache.org/jira/browse/FALCON-1716
> Project: Falcon
> Issue Type: Bug
> Components: scheduler
> Affects Versions: 0.9
> Reporter: Pragya Mittal
> Assignee: pavan kumar kolamuri
> Attachments: FALCON-1716.patch, jdbc-timedout.log
>
>
> If mysql is not interacted for less than 53,434,939 milliseconds, the query
> fails with CommunicationsException for first few attempts after which
> connection is set. We should configure communication window for the same.
> Error is :
> {noformat}
> 2015-12-30 06:54:47,294 ERROR - [357665612@qtp-1816147548-10 -
> 8ebf22cf-4f82-4280-a248-fa3ca6048042:dataqa:GET//instance/params/process/ProcessInstanceStatusTest-agregator-coord16-50a6b241]
> ~ Failed to display params of an instance (AbstractInstanceManager:553)
> <openjpa-2.4.0-r422266:1674604 fatal general error>
> org.apache.openjpa.persistence.PersistenceException: The last packet
> successfully received from the server was 53,434,939 milliseconds ago. The
> last packet sent successfully to the server was 53,434,939 milliseconds ago.
> is longer than the server configured value of 'wait_timeout'. You should
> consider either expiring and/or testing connection validity before use in
> your application, increasing the server configured values for client
> timeouts, or using the Connector/J connection property 'autoReconnect=true'
> to avoid this problem.
> at
> org.apache.openjpa.jdbc.sql.DBDictionary.narrow(DBDictionary.java:5001)
> at
> org.apache.openjpa.jdbc.sql.DBDictionary.newStoreException(DBDictionary.java:4961)
> at
> org.apache.openjpa.jdbc.sql.SQLExceptions.getStore(SQLExceptions.java:133)
> at
> org.apache.openjpa.jdbc.sql.SQLExceptions.getStore(SQLExceptions.java:107)
> at
> org.apache.openjpa.jdbc.sql.SQLExceptions.getStore(SQLExceptions.java:59)
> at
> org.apache.openjpa.jdbc.kernel.JDBCStoreManager.connect(JDBCStoreManager.java:967)
> at
> org.apache.openjpa.jdbc.kernel.JDBCStoreManager.getConnection(JDBCStoreManager.java:241)
> at
> org.apache.openjpa.jdbc.kernel.PreparedSQLStoreQuery$PreparedSQLExecutor.executeQuery(PreparedSQLStoreQuery.java:104)
> at org.apache.openjpa.kernel.QueryImpl.execute(QueryImpl.java:1004)
> at org.apache.openjpa.kernel.QueryImpl.execute(QueryImpl.java:862)
> at org.apache.openjpa.kernel.QueryImpl.execute(QueryImpl.java:793)
> at
> org.apache.openjpa.kernel.DelegatingQuery.execute(DelegatingQuery.java:541)
> at
> org.apache.openjpa.persistence.QueryImpl.execute(QueryImpl.java:274)
> at
> org.apache.openjpa.persistence.QueryImpl.getResultList(QueryImpl.java:290)
> at
> org.apache.falcon.state.store.jdbc.JDBCStateStore.getEntityByKey(JDBCStateStore.java:95)
> at
> org.apache.falcon.state.store.jdbc.JDBCStateStore.entityExists(JDBCStateStore.java:105)
> at
> org.apache.falcon.workflow.engine.FalconWorkflowEngine.isActive(FalconWorkflowEngine.java:98)
> at
> org.apache.falcon.workflow.WorkflowEngineFactory.getWorkflowEngine(WorkflowEngineFactory.java:54)
> at
> org.apache.falcon.resource.AbstractEntityManager.getWorkflowEngine(AbstractEntityManager.java:1132)
> at
> org.apache.falcon.resource.AbstractInstanceManager.getInstanceParams(AbstractInstanceManager.java:550)
> at
> org.apache.falcon.resource.InstanceManager.getInstanceParams(InstanceManager.java:178)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:497)
> at
> com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60)
> at
> com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$TypeOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:185)
> at
> com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75)
> {noformat}
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