[CLOUDSTACK-5293] Error while collecting vm disk stats from hosts if iso is attached to vm

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 4.2.0, 4.3.0
• Fix Version/s: 4.2.1, 4.3.0
• Security Level: Public (Anyone can view this level - this is the default.)
• Assignee: Wei Zhou
• Reporter: Wei Zhou
• Created: 27/Nov/13 13:25
• Updated: 29/Nov/13 10:41
• Resolved: 27/Nov/13 13:40

Description

if iso is attached to vm, there is an Error while collecting vm disk stats from hosts.

2013-11-27 00:00:09,371 DEBUG [agent.transport.Request] (StatsCollector-3:null) Seq 1-1451690452: Received: { Ans: , MgmtId: 345051528835, via: 1, Ver: v1, Flags: 10,

{ GetVmDiskStatsAnswer }

}
2013-11-27 00:00:09,372 DEBUG [agent.manager.AgentManagerImpl] (StatsCollector-3:null) Details from executing class com.cloud.agent.api.GetVmDiskStatsCommand:
2013-11-27 00:00:09,398 WARN [cloud.server.StatsCollector] (StatsCollector-3:null) Error while collecting vm disk stats from hosts
java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
at java.util.ArrayList.rangeCheck(ArrayList.java:571)
at java.util.ArrayList.get(ArrayList.java:349)
at com.cloud.server.StatsCollector$VmDiskStatsTask.run(StatsCollector.java:474)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:351)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:178)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:165)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:267)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:679)
2013-11-27 00:00:09,400 DEBUG [db.Transaction.Transaction] (StatsCollector-3:null) Rolling back the transaction: Time = 308 Name = -StatsCollector$VmDiskStatsTask.run:441-Executors$RunnableAdapter.call:471-FutureTask$Sync.innerRunAndReset:351-FutureTask.runAndReset:178-ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201:165-ScheduledThreadPoolExecutor$ScheduledFutureTask.run:267-ThreadPoolExecutor.runWorker:1146-ThreadPoolExecutor$Worker.run:615-Thread.run:679; called by -Transaction.rollback:897-Transaction.removeUpTo:840-Transaction.close:664-StatsCollector$VmDiskStatsTask.run:554-Executors$RunnableAdapter.call:471-FutureTask$Sync.innerRunAndReset:351-FutureTask.runAndReset:178-ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201:165-ScheduledThreadPoolExecutor$ScheduledFutureTask.run:267-ThreadPoolExecutor.runWorker:1146-ThreadPoolExecutor$Worker.run:615-Thread.run:679

after added some debug code, This happened when statscollecter want to collect data from iso.

2013-11-27 14:15:31,662 DEBUG [cloud.server.StatsCollector] (StatsCollector-3:null) path = 204-2-1bcedaea-51c2-314c-a7c6-c39dd4f0dc8e.iso
2013-11-27 14:15:31,662 DEBUG [cloud.server.StatsCollector] (StatsCollector-3:null) vmId = 51