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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CLOUDSTACK-9595) Transactions are not getting retried in case of database deadlock errors
Date Wed, 23 Nov 2016 17:09:59 GMT

    [ https://issues.apache.org/jira/browse/CLOUDSTACK-9595?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15690746#comment-15690746
] 

ASF GitHub Bot commented on CLOUDSTACK-9595:
--------------------------------------------

Github user serg38 commented on the issue:

    https://github.com/apache/cloudstack/pull/1762
  
    @jburwell We've been running this fix as a part of proprietary CS for several weeks now.
We are observing elimination of deadlocks and no DB corruption. Retry seems to be the only
realistic way of dealing with deadlocks in complex environment like ACS. Can we come up with
a limited scope/conditions of this PR to move forward ?


> Transactions are not getting retried in case of database deadlock errors
> ------------------------------------------------------------------------
>
>                 Key: CLOUDSTACK-9595
>                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-9595
>             Project: CloudStack
>          Issue Type: Bug
>      Security Level: Public(Anyone can view this level - this is the default.) 
>    Affects Versions: 4.8.0
>            Reporter: subhash yedugundla
>             Fix For: 4.8.1
>
>
> Customer is seeing occasional error 'Deadlock found when trying to get lock; try restarting
transaction' messages in their management server logs.  It happens regularly at least once
a day.  The following is the error seen 
> 2015-12-09 19:23:19,450 ERROR [cloud.api.ApiServer] (catalina-exec-3:ctx-f05c58fc ctx-39c17156
ctx-7becdf6e) unhandled exception executing api command: [Ljava.lang.String;@230a6e7f
> com.cloud.utils.exception.CloudRuntimeException: DB Exception on: com.mysql.jdbc.JDBC4PreparedStatement@74f134e3:
DELETE FROM instance_group_vm_map WHERE instance_group_vm_map.instance_id = 941374
> 	at com.cloud.utils.db.GenericDaoBase.expunge(GenericDaoBase.java:1209)
> 	at sun.reflect.GeneratedMethodAccessor360.invoke(Unknown Source)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> 	at java.lang.reflect.Method.invoke(Method.java:606)
> 	at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)
> 	at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
> 	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
> 	at com.cloud.utils.db.TransactionContextInterceptor.invoke(TransactionContextInterceptor.java:34)
> 	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:161)
> 	at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:91)
> 	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
> 	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
> 	at com.sun.proxy.$Proxy237.expunge(Unknown Source)
> 	at com.cloud.vm.UserVmManagerImpl$2.doInTransactionWithoutResult(UserVmManagerImpl.java:2593)
> 	at com.cloud.utils.db.TransactionCallbackNoReturn.doInTransaction(TransactionCallbackNoReturn.java:25)
> 	at com.cloud.utils.db.Transaction$2.doInTransaction(Transaction.java:57)
> 	at com.cloud.utils.db.Transaction.execute(Transaction.java:45)
> 	at com.cloud.utils.db.Transaction.execute(Transaction.java:54)
> 	at com.cloud.vm.UserVmManagerImpl.addInstanceToGroup(UserVmManagerImpl.java:2575)
> 	at com.cloud.vm.UserVmManagerImpl.updateVirtualMachine(UserVmManagerImpl.java:2332)



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