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https://issues.apache.org/jira/browse/CLOUDSTACK-9595?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15656851#comment-15656851
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ASF GitHub Bot commented on CLOUDSTACK-9595:
--------------------------------------------
GitHub user yvsubhash opened a pull request:
https://github.com/apache/cloudstack/pull/1762
CLOUDSTACK-9595 Transactions are not getting retried in case of datab…
CLOUDSTACK-9595 Transactions are not getting retried in case of database
deadlock errors
Problem Statement
--------------------------
MySQLTransactionRollbackException is seen frequently in logs
Root Cause
----------------
Attempts to lock rows in the core data access layer of database fails if
there is a possibility of deadlock. However Operations are not getting retried
in case of deadlock. So introducing retries here
Solution
-----------
Operations would be retried after some wait time in case of dead lock
exception
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/yvsubhash/cloudstack CLOUDSTACK-9595
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/cloudstack/pull/1762.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #1762
----
commit 600ae7cbee28d43e6007979b87e150abd2a70a7e
Author: subhash yedugundla <[email protected]>
Date: 2016-06-14T10:16:16Z
CLOUDSTACK-9595 Transactions are not getting retried in case of database
deadlock errors
----
> 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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