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https://issues.apache.org/jira/browse/CLOUDSTACK-9595?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15665499#comment-15665499
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ASF GitHub Bot commented on CLOUDSTACK-9595:
--------------------------------------------
Github user jburwell commented on the issue:
https://github.com/apache/cloudstack/pull/1762
@serg38 there remains a risk when those methods are executed in the context
of an open transaction where DMLs have already been executed and subsequent
DMLs will be executed. In this scenario, the first set of the changes would be
lost due to the rollback triggered by the query deadlock with the second set
proceeding successfully.
> 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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