cloudstack-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Koushik Das (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CLOUDSTACK-8603) Random list VM failures at scale (more than 1000 VMs) when VM has resource tags
Date Wed, 01 Jul 2015 11:55:04 GMT
Koushik Das created CLOUDSTACK-8603:
---------------------------------------

             Summary: Random list VM failures at scale (more than 1000 VMs) when VM has resource
tags
                 Key: CLOUDSTACK-8603
                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-8603
             Project: CloudStack
          Issue Type: Bug
      Security Level: Public (Anyone can view this level - this is the default.)
          Components: Management Server
    Affects Versions: 4.5.1, 4.5.0
            Reporter: Koushik Das
            Assignee: Koushik Das
             Fix For: 4.6.0


Random failures seen in list VM API call (VMs having resource tag) with the following exception.
As can be seen from the stack trace, exception is thrown while creating the list response.
The test scenario involved doing VM creation/deletion/list operations concurrently over a
period of time.

2015-05-27 00:16:54,239 ERROR [c.c.a.ApiServer] (catalina-exec-24:ctx-c122d00c ctx-fcdc0d00
ctx-3df89f23) (logid:6004902e) unhandled exception executing api command: [Ljava.lang.String;@76642f16
java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
at java.util.ArrayList.rangeCheck(ArrayList.java:635)
at java.util.ArrayList.get(ArrayList.java:411)
at com.cloud.api.query.dao.ResourceTagJoinDaoImpl.searchById(ResourceTagJoinDaoImpl.java:154)
at sun.reflect.GeneratedMethodAccessor138.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.$Proxy86.searchById(Unknown Source)
at com.cloud.api.ApiDBUtils.findResourceTagViewById(ApiDBUtils.java:1636)
at com.cloud.api.query.dao.UserVmJoinDaoImpl.newUserVmResponse(UserVmJoinDaoImpl.java:266)
at sun.reflect.GeneratedMethodAccessor126.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
at com.cloud.utils.db.TransactionContextInterceptor.invoke(TransactionContextInterceptor.java:34)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:161)
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:91)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
at com.sun.proxy.$Proxy176.newUserVmResponse(Unknown Source)
at com.cloud.api.ApiDBUtils.newUserVmResponse(ApiDBUtils.java:1600)
at com.cloud.api.query.ViewResponseHelper.createUserVmResponse(ViewResponseHelper.java:140)
at com.cloud.api.query.QueryManagerImpl.searchForUserVMs(QueryManagerImpl.java:762)
at org.apache.cloudstack.api.command.user.vm.ListVMsCmd.execute(ListVMsCmd.java:227)
at com.cloud.api.ApiDispatcher.dispatch(ApiDispatcher.java:150)
at com.cloud.api.ApiServer.queueCommand(ApiServer.java:700)
at com.cloud.api.ApiServer.handleRequest(ApiServer.java:525)
at com.cloud.api.ApiServlet.processRequestInContext(ApiServlet.java:282)



There are 2 part to list VM API:
a. Get a list of VMs based on search criteria from the user_vm_view view in DB.
b. Create the response records corresponding to each VM obtained as part of (a). This record
creation involves fetching additional data from other views/tables in the DB. One such view
is resource_tag_view.

Now consider the following sequence of events that may lead to the issue:
a. List VM call fetches a lot of VMs from user_vm_view.
b. VM response is created for each VM by iterating over the list obtained from (a).
c. Now while (b) is in progress, a VM which is in the list from (a) and not yet processed
in (b) got destroyed.
d. Now when response generation happens for destroyed VM, there is a DB query to fetch resource
tag details from resource_tag_view. This query returns empty as the resource tag got deleted
from DB as part of VM destroy.
e. In the resource tag fetching code there is no check for the condition mentioned in (d)
and so the index out of bound exception.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Mime
View raw message