Error while disabling backends due to NoSuchElementException in
AbstractPoolConnectionManager.doConnectionFinalization(line 226)
--------------------------------------------------------------------------------------------------------------------------------
Key: SEQUOIA-1143
URL: https://forge.continuent.org/jira/browse/SEQUOIA-1143
Project: Sequoia
Type: Bug
Components: Core
Reporter: Stephane Giron
Assigned to: Stephane Giron
Fix For: sequoia 2.10.11
This is due to an unsynchronized access to freeConnections.
This unsynchronized access is done by removeIdleConnectionsThread in the
VariablePoolConnectionManager, which is adding elements out of a synchronized
block.
Full stack trace is :
Error while disabling backends
[org.continuent.sequoia.common.jmx.management.backendi...@1a0db2]
org.continuent.sequoia.common.exceptions.VirtualDatabaseException
at
org.continuent.sequoia.controller.virtualdatabase.DistributedVirtualDatabase.sendMessageToControllers(DistributedVirtualDatabase.java:3040)
at
org.continuent.sequoia.controller.requestmanager.distributed.DistributedRequestManager.disableBackendsWithCheckpoint(DistributedRequestManager.java:371)
at
org.continuent.sequoia.controller.requestmanager.RequestManager.disableBackendWithCheckpoint(RequestManager.java:2775)
at
org.continuent.sequoia.controller.virtualdatabase.VirtualDatabase.disableBackendWithCheckpoint(VirtualDatabase.java:1692)
at
org.continuent.sequoia.controller.virtualdatabase.management.VirtualDatabase.disableBackendWithCheckpoint(VirtualDatabase.java:213)
at sun.reflect.GeneratedMethodAccessor209.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.sun.jmx.mbeanserver.StandardMBeanIntrospector.invokeM2(Unknown
Source)
at com.sun.jmx.mbeanserver.StandardMBeanIntrospector.invokeM2(Unknown
Source)
at com.sun.jmx.mbeanserver.MBeanIntrospector.invokeM(Unknown Source)
at com.sun.jmx.mbeanserver.PerInterface.invoke(Unknown Source)
at com.sun.jmx.mbeanserver.MBeanSupport.invoke(Unknown Source)
at javax.management.StandardMBean.invoke(Unknown Source)
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(Unknown
Source)
at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(Unknown Source)
at
org.continuent.sequoia.controller.jmx.ChainedMBeanServer.invoke(ChainedMBeanServer.java:318)
at
org.continuent.sequoia.controller.jmx.AuthenticatingMBeanServer.invoke(AuthenticatingMBeanServer.java:127)
at javax.management.remote.rmi.RMIConnectionImpl.doOperation(Unknown
Source)
at javax.management.remote.rmi.RMIConnectionImpl.access$200(Unknown
Source)
at
javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(Unknown
Source)
at java.security.AccessController.doPrivileged(Native Method)
at
javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(Unknown
Source)
at javax.management.remote.rmi.RMIConnectionImpl.invoke(Unknown Source)
at sun.reflect.GeneratedMethodAccessor14.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at sun.rmi.server.UnicastServerRef.dispatch(Unknown Source)
at sun.rmi.transport.Transport$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(Unknown
Source)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(Unknown
Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown
Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: org.continuent.sequoia.common.exceptions.ControllerException
at
org.continuent.sequoia.common.exceptions.SequoiaException.fillInStackTrace(SequoiaException.java:103)
at java.lang.Throwable.<init>(Throwable.java:181)
at java.lang.Exception.<init>(Unknown Source)
at
org.continuent.sequoia.common.exceptions.SequoiaException.<init>(SequoiaException.java:66)
at
org.continuent.sequoia.common.exceptions.ControllerException.<init>(ControllerException.java:61)
at
org.continuent.sequoia.controller.virtualdatabase.protocol.DisableBackendsAndSetCheckpoint.handleMessageMultiThreaded(DisableBackendsAndSetCheckpoint.java:213)
at
org.continuent.sequoia.controller.virtualdatabase.DistributedVirtualDatabase.handleMessageMultiThreaded(DistributedVirtualDatabase.java:384)
at
org.continuent.hedera.adapters.MulticastRequestAdapterThread.run(MulticastRequestAdapterThread.java:129)
Caused by: java.util.NoSuchElementException
at java.util.LinkedList.remove(Unknown Source)
at java.util.LinkedList.removeLast(Unknown Source)
at
org.continuent.sequoia.controller.connection.AbstractPoolConnectionManager.doConnectionFinalization(AbstractPoolConnectionManager.java:226)
at
org.continuent.sequoia.controller.connection.VariablePoolConnectionManager.doConnectionFinalization(VariablePoolConnectionManager.java:313)
at
org.continuent.sequoia.controller.connection.AbstractConnectionManager.finalizeConnections(AbstractConnectionManager.java:337)
at
org.continuent.sequoia.controller.backend.DatabaseBackend.finalizeConnections(DatabaseBackend.java:677)
at
org.continuent.sequoia.controller.loadbalancer.raidb1.RAIDb1.terminateThreadsAndConnections(RAIDb1.java:2265)
at
org.continuent.sequoia.controller.loadbalancer.raidb1.RAIDb1.terminateThreadsAndConnections(RAIDb1.java:2256)
at
org.continuent.sequoia.controller.loadbalancer.raidb1.RAIDb1.disableBackend(RAIDb1.java:2228)
at
org.continuent.sequoia.controller.virtualdatabase.protocol.DisableBackendsAndSetCheckpoint.handleMessageMultiThreaded(DisableBackendsAndSetCheckpoint.java:196)
... 2 more
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