[ https://forge.continuent.org/jira/browse/SEQUOIA-1033?page=all ]
Robert Hodges resolved SEQUOIA-1033:
------------------------------------
Assign To: Robert Hodges
Resolution: Fixed
> backup system throws exception because pending read request has not been
> processed
> -----------------------------------------------------------------------------------
>
> Key: SEQUOIA-1033
> URL: https://forge.continuent.org/jira/browse/SEQUOIA-1033
> Project: Sequoia
> Type: Bug
> Components: Backup System
> Versions: Sequoia 2.10.9
> Environment: RHEL4/Ubuntu 7.04 with MySQL 5.0.38
> Reporter: Robert Hodges
> Assignee: Robert Hodges
> Fix For: sequoia 2.10.10
>
>
> Backup process throws an exception if there is a pending request
> (DatabaseBackend.getPendingReequests()). The process to disable before taking
> a backup does not wait for pending read requests in active transactions or
> persistentConnections in
> DatabaseBackend.waitForAllTransactionsAndPersistentConnectionsToComplete().
> The correct fix may be to wait for all pending requests in
> waitForAllTransactionsAndPersistentConnectionsToComplete() as well.
> Here is a typical stack trace.
> 2008-02-07 08:50:04,110 WARN sequoia.controller.connection Some connections
> are still active, destroying them.
> 2008-02-07 08:50:04,238 INFO controller.virtualdatabase.primUser Backend
> c1_db is now disabled
> 2008-02-07 08:50:04,238 INFO controller.virtualdatabase.primUser Backend
> c1_db disabled on controller Member(address=c1host/10.237.152.24:6523,
> uid=vdb1)
> 2008-02-07 08:50:04,246 INFO controller.RequestManager.vdb1 Resuming activity
> for primUser
> 2008-02-07 08:50:04,255 INFO controller.RequestManager.vdb1 All activity is
> now resumed for primUser
> 2008-02-07 08:50:04,255 INFO controller.RequestManager.vdb1 Backend c1_db is
> now disabled
> 2008-02-07 08:50:04,255 INFO controller.RequestManager.vdb1 Starting backup
> of backend c1_db
> 2008-02-07 08:50:04,255 WARN controller.RequestManager.vdb1 Pending:SELECT
> sleep(10)
> 2008-02-07 08:50:04,255 WARN controller.RequestManager.vdb1 Pending Requests:1
> 2008-02-07 08:50:04,255 WARN controller.RequestManager.vdb1 Read enabled:false
> 2008-02-07 08:50:04,255 WARN controller.RequestManager.vdb1 Write
> enabled:false
> 2008-02-07 08:50:04,256 ERROR controller.RequestManager.vdb1 Backup command
> failed
> org.continuent.sequoia.common.exceptions.BackupException: Backend is not
> ready for backup: 1 remaining pending requests
> at
> org.continuent.sequoia.common.exceptions.SequoiaException.fillInStackTrace(SequoiaException.java:103)
> at java.lang.Throwable.<init>(Throwable.java:196)
> at java.lang.Exception.<init>(Exception.java:41)
> at
> org.continuent.sequoia.common.exceptions.SequoiaException.<init>(SequoiaException.java:57)
> at
> org.continuent.sequoia.common.exceptions.BackupException.<init>(BackupException.java:50)
> at
> org.continuent.sequoia.controller.requestmanager.RequestManager.backupBackend(RequestManager.java:2887)
> at
> org.continuent.sequoia.controller.virtualdatabase.VirtualDatabase.backupBackend(VirtualDatabase.java:2366)
> at
> org.continuent.sequoia.controller.virtualdatabase.management.VirtualDatabase.backupBackend(VirtualDatabase.java:403)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:585)
> at
> com.sun.jmx.mbeanserver.StandardMetaDataImpl.invoke(StandardMetaDataImpl.java:414)
> at javax.management.StandardMBean.invoke(StandardMBean.java:323)
> at
> com.sun.jmx.mbeanserver.DynamicMetaDataImpl.invoke(DynamicMetaDataImpl.java:213)
> at com.sun.jmx.mbeanserver.MetaDataImpl.invoke(MetaDataImpl.java:220)
> at
> com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:815)
> at
> com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:784)
> 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(RMIConnectionImpl.java:1410)
> at
> javax.management.remote.rmi.RMIConnectionImpl.access$100(RMIConnectionImpl.java:81)
> at
> javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1247)
> at java.security.AccessController.doPrivileged(Native Method)
> at
> javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1350)
> at
> javax.management.remote.rmi.RMIConnectionImpl.invoke(RMIConnectionImpl.java:784)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:585)
> at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:294)
> at sun.rmi.transport.Transport$1.run(Transport.java:153)
> at java.security.AccessController.doPrivileged(Native Method)
> at sun.rmi.transport.Transport.serviceCall(Transport.java:149)
> at
> sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:466)
> at
> sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:707)
> at java.lang.Thread.run(Thread.java:595)
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