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From "stack (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-5816) Balancer and ServerShutdownHandler concurrently reassigning the same region
Date Wed, 18 Apr 2012 18:44:40 GMT

     [ https://issues.apache.org/jira/browse/HBASE-5816?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

stack updated HBASE-5816:
-------------------------

    Priority: Critical  (was: Major)
     Summary: Balancer and ServerShutdownHandler concurrently reassigning the same region
 (was: Two concurrent assign would cause master to abort with msg "Unexpected state trying
to OFFLINE; ")

Changing title and upping the priority.  At a minimum the balancer and shutdown handler should
populate a queue that a single assignment process works on rather than as we have now, two
threads doing independent assigns or balancer should not move regions that are currently in
RIT or regions that were moved recently, etc.
                
> Balancer and ServerShutdownHandler concurrently reassigning the same region
> ---------------------------------------------------------------------------
>
>                 Key: HBASE-5816
>                 URL: https://issues.apache.org/jira/browse/HBASE-5816
>             Project: HBase
>          Issue Type: Bug
>          Components: master
>    Affects Versions: 0.90.6
>            Reporter: Maryann Xue
>            Priority: Critical
>         Attachments: HBASE-5816.patch
>
>
> The first assign thread exits with success after updating the RegionState to PENDING_OPEN,
while the second assign follows immediately into "assign" and fails the RegionState check
in setOfflineInZooKeeper(). This causes the master to abort.
> In the below case, the two concurrent assigns occurred when AM tried to assign a region
to a dying/dead RS, and meanwhile the ShutdownServerHandler tried to assign this region (from
the region plan) spontaneously.
> 2012-04-17 05:44:57,648 INFO org.apache.hadoop.hbase.master.HMaster: balance hri=TABLE_ORDER_CUSTOMER,,1334017820846.fe38fe31caf40b6e607a3e6bbed6404b.,
src=hadoop05.sh.intel.com,60020,1334544902186, dest=xmlqa-clv16.sh.intel.com,60020,1334612497253
> 2012-04-17 05:44:57,648 DEBUG org.apache.hadoop.hbase.master.AssignmentManager: Starting
unassignment of region TABLE_ORDER_CUSTOMER,,1334017820846.fe38fe31caf40b6e607a3e6bbed6404b.
(offlining)
> 2012-04-17 05:44:57,648 DEBUG org.apache.hadoop.hbase.master.AssignmentManager: Sent
CLOSE to serverName=hadoop05.sh.intel.com,60020,1334544902186, load=(requests=0, regions=0,
usedHeap=0, maxHeap=0) for region TABLE_ORDER_CUSTOMER,,1334017820846.fe38fe31caf40b6e607a3e6bbed6404b.
> 2012-04-17 05:44:57,666 DEBUG org.apache.hadoop.hbase.master.AssignmentManager: Handling
new unassigned node: /hbase/unassigned/fe38fe31caf40b6e607a3e6bbed6404b (region=TABLE_ORDER_CUSTOMER,,1334017820846.fe38fe31caf40b6e607a3e6bbed6404b.,
server=hadoop05.sh.intel.com,60020,1334544902186, state=RS_ZK_REGION_CLOSING)
> 2012-04-17 05:52:58,984 DEBUG org.apache.hadoop.hbase.master.AssignmentManager: Forcing
OFFLINE; was=TABLE_ORDER_CUSTOMER,,1334017820846.fe38fe31caf40b6e607a3e6bbed6404b. state=CLOSED,
ts=1334612697672, server=hadoop05.sh.intel.com,60020,1334544902186
> 2012-04-17 05:52:58,984 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign: master:60000-0x236b912e9b3000e
Creating (or updating) unassigned node for fe38fe31caf40b6e607a3e6bbed6404b with OFFLINE state
> 2012-04-17 05:52:59,096 DEBUG org.apache.hadoop.hbase.master.AssignmentManager: Using
pre-existing plan for region TABLE_ORDER_CUSTOMER,,1334017820846.fe38fe31caf40b6e607a3e6bbed6404b.;
plan=hri=TABLE_ORDER_CUSTOMER,,1334017820846.fe38fe31caf40b6e607a3e6bbed6404b., src=hadoop05.sh.intel.com,60020,1334544902186,
dest=xmlqa-clv16.sh.intel.com,60020,1334612497253
> 2012-04-17 05:52:59,096 DEBUG org.apache.hadoop.hbase.master.AssignmentManager: Assigning
region TABLE_ORDER_CUSTOMER,,1334017820846.fe38fe31caf40b6e607a3e6bbed6404b. to xmlqa-clv16.sh.intel.com,60020,1334612497253
> 2012-04-17 05:54:19,159 DEBUG org.apache.hadoop.hbase.master.AssignmentManager: Forcing
OFFLINE; was=TABLE_ORDER_CUSTOMER,,1334017820846.fe38fe31caf40b6e607a3e6bbed6404b. state=PENDING_OPEN,
ts=1334613179096, server=xmlqa-clv16.sh.intel.com,60020,1334612497253
> 2012-04-17 05:54:59,033 WARN org.apache.hadoop.hbase.master.AssignmentManager: Failed
assignment of TABLE_ORDER_CUSTOMER,,1334017820846.fe38fe31caf40b6e607a3e6bbed6404b. to serverName=xmlqa-clv16.sh.intel.com,60020,1334612497253,
load=(requests=0, regions=0, usedHeap=0, maxHeap=0), trying to assign elsewhere instead; retry=0
> java.net.SocketTimeoutException: Call to /10.239.47.87:60020 failed on socket timeout
exception: java.net.SocketTimeoutException: 120000 millis timeout while waiting for channel
to be ready for read. ch : java.nio.channels.SocketChannel[connected local=/10.239.47.89:41302
remote=/10.239.47.87:60020]
>         at org.apache.hadoop.hbase.ipc.HBaseClient.wrapException(HBaseClient.java:805)
>         at org.apache.hadoop.hbase.ipc.HBaseClient.call(HBaseClient.java:778)
>         at org.apache.hadoop.hbase.ipc.HBaseRPC$Invoker.invoke(HBaseRPC.java:283)
>         at $Proxy7.openRegion(Unknown Source)
>         at org.apache.hadoop.hbase.master.ServerManager.sendRegionOpen(ServerManager.java:573)
>         at org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:1127)
>         at org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:912)
>         at org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:892)
>         at org.apache.hadoop.hbase.master.handler.ClosedRegionHandler.process(ClosedRegionHandler.java:92)
>         at org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:162)
>         at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
>         at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
>         at java.lang.Thread.run(Thread.java:662)
> Caused by: java.net.SocketTimeoutException: 120000 millis timeout while waiting for channel
to be ready for read. ch : java.nio.channels.SocketChannel[connected local=/10.239.47.89:41302
remote=/10.239.47.87:60020]
>         at org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:164)
>         at org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:155)
>         at org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:128)
>         at java.io.FilterInputStream.read(FilterInputStream.java:116)
>         at org.apache.hadoop.hbase.ipc.HBaseClient$Connection$PingInputStream.read(HBaseClient.java:301)
>         at java.io.BufferedInputStream.fill(BufferedInputStream.java:218)
>         at java.io.BufferedInputStream.read(BufferedInputStream.java:237)
>         at java.io.DataInputStream.readInt(DataInputStream.java:370)
>         at org.apache.hadoop.hbase.ipc.HBaseClient$Connection.receiveResponse(HBaseClient.java:541)
>         at org.apache.hadoop.hbase.ipc.HBaseClient$Connection.run(HBaseClient.java:479)
> 2012-04-17 05:54:59,035 DEBUG org.apache.hadoop.hbase.master.AssignmentManager: No previous
transition plan was found (or we are ignoring an existing plan) for TABLE_ORDER_CUSTOMER,,1334017820846.fe38fe31caf40b6e607a3e6bbed6404b.
so generated a random one; hri=TABLE_ORDER_CUSTOMER,,1334017820846.fe38fe31caf40b6e607a3e6bbed6404b.,
src=, dest=hadoop06.sh.intel.com,60020,1334544901894; 7 (online=7, exclude=serverName=xmlqa-clv16.sh.intel.com,60020,1334612497253,
load=(requests=0, regions=0, usedHeap=0, maxHeap=0)) available servers
> 2012-04-17 05:54:59,035 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign: master:60000-0x236b912e9b3000e
Creating (or updating) unassigned node for fe38fe31caf40b6e607a3e6bbed6404b with OFFLINE state
> 2012-04-17 05:54:59,045 DEBUG org.apache.hadoop.hbase.master.AssignmentManager: Using
pre-existing plan for region TABLE_ORDER_CUSTOMER,,1334017820846.fe38fe31caf40b6e607a3e6bbed6404b.;
plan=hri=TABLE_ORDER_CUSTOMER,,1334017820846.fe38fe31caf40b6e607a3e6bbed6404b., src=, dest=hadoop06.sh.intel.com,60020,1334544901894
> 2012-04-17 05:54:59,045 DEBUG org.apache.hadoop.hbase.master.AssignmentManager: Assigning
region TABLE_ORDER_CUSTOMER,,1334017820846.fe38fe31caf40b6e607a3e6bbed6404b. to hadoop06.sh.intel.com,60020,1334544901894
> 2012-04-17 05:54:59,046 FATAL org.apache.hadoop.hbase.master.HMaster: Unexpected state
trying to OFFLINE; TABLE_ORDER_CUSTOMER,,1334017820846.fe38fe31caf40b6e607a3e6bbed6404b. state=PENDING_OPEN,
ts=1334613299045, server=hadoop06.sh.intel.com,60020,1334544901894
> java.lang.IllegalStateException
>         at org.apache.hadoop.hbase.master.AssignmentManager.setOfflineInZooKeeper(AssignmentManager.java:1167)
>         at org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:1107)
>         at org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:912)
>         at org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:892)
>         at org.apache.hadoop.hbase.master.handler.ServerShutdownHandler.process(ServerShutdownHandler.java:259)
>         at org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:162)
>         at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
>         at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
>         at java.lang.Thread.run(Thread.java:662)
> 2012-04-17 05:54:59,047 INFO org.apache.hadoop.hbase.master.HMaster: Aborting

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