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From "gaojinchao (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-5545) region can't be opened for a long time. Because the creating File failed.
Date Fri, 09 Mar 2012 02:17:57 GMT
region can't be opened for a long time. Because the creating File failed.
-------------------------------------------------------------------------

                 Key: HBASE-5545
                 URL: https://issues.apache.org/jira/browse/HBASE-5545
             Project: HBase
          Issue Type: Bug
          Components: regionserver
    Affects Versions: 0.90.6
            Reporter: gaojinchao
            Assignee: gaojinchao
             Fix For: 0.90.7


Scenario:
------------
1. File is created 
2. But while writing data, all datanodes might have crashed. So writing data will fail.
3. Now even if close is called in finally block, close also will fail and throw the Exception
because writing data failed.
4. After this if RS try to create the same file again, then AlreadyBeingCreatedException will
come.

Suggestion to handle this scenario.
---------------------------
1. Check for the existence of the file, if exists delete the file and create new file. 

Here delete call for the file will not check whether the file is open or closed.

Overwrite Option:
----------------
1. Overwrite option will be applicable if you are trying to overwrite a closed file.
2. If the file is not closed, then even with overwrite option Same AlreadyBeingCreatedException
will be thrown.
This is the expected behaviour to avoid the Multiple clients writing to same file.


Region server logs:

[2012-03-07 20:51:45,858] [ERROR] [RS_OPEN_REGION-158-1-131-48,20020,1331107668635-23] [com.huawei.isap.ump.ha.client.RPCRetryAndSwitchInvoker
105] Exception occured while connecting to server : 
ActiveServerConnectionInfo:
Metadata:158-1-131-48/158.1.132.19:9000
Version:145720623220907

org.apache.hadoop.ipc.RemoteException: org.apache.hadoop.hdfs.protocol.AlreadyBeingCreatedException:
failed to create file /hbase/test1/12c01902324218d14b17a5880f24f64b/.tmp/.regioninfo for DFSClient_hb_rs_158-1-131-48,20020,1331107668635_1331107669061_-252463556_25
on client 158.1.132.19 because current leaseholder is trying to recreate file.
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.recoverLeaseInternal(FSNamesystem.java:1570)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.startFileInternal(FSNamesystem.java:1440)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.startFile(FSNamesystem.java:1382)
at org.apache.hadoop.hdfs.server.namenode.NameNode.create(NameNode.java:658)
at sun.reflect.GeneratedMethodAccessor9.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:547)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1137)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1133)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:396)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1131)

at org.apache.hadoop.ipc.Client.call(Client.java:961)
at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:245)
at $Proxy6.create(Unknown Source)
at sun.reflect.GeneratedMethodAccessor14.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.huawei.isap.ump.ha.client.RPCRetryAndSwitchInvoker.invokeMethod(RPCRetryAndSwitchInvoker.java:201)
at com.huawei.isap.ump.ha.client.RPCRetryAndSwitchInvoker.invokeMethod(RPCRetryAndSwitchInvoker.java:189)
at com.huawei.isap.ump.ha.client.RPCRetryAndSwitchInvoker.invoke(RPCRetryAndSwitchInvoker.java:77)
at $Proxy6.create(Unknown Source)
at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.<init>(DFSClient.java:3643)
at org.apache.hadoop.hdfs.DFSClient.create(DFSClient.java:778)
at org.apache.hadoop.hdfs.DistributedFileSystem.create(DistributedFileSystem.java:364)
at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:630)
at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:611)
at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:518)
at org.apache.hadoop.hbase.regionserver.HRegion.checkRegioninfoOnFilesystem(HRegion.java:424)
at org.apache.hadoop.hbase.regionserver.HRegion.initialize(HRegion.java:340)
at org.apache.hadoop.hbase.regionserver.HRegion.openHRegion(HRegion.java:2672)
at org.apache.hadoop.hbase.regionserver.HRegion.openHRegion(HRegion.java:2658)
at org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler.openRegion(OpenRegionHandler.java:330)
at org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler.process(OpenRegionHandler.java:116)
at org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:158)
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)
[2012-03-07 20:51:45,858] [WARN ] [RS_OPEN_REGION-158-1-131-48,20020,1331107668635-23] [com.huawei.isap.ump.ha.client.RPCRetryAndSwitchInvoker
131] Retrying the method call: public abstract void org.apache.hadoop.hdfs.protocol.ClientProtocol.create(java.lang.String,org.apache.hadoop.fs.permission.FsPermission,java.lang.String,boolean,boolean,short,long)
throws java.io.IOException with arguments of length: 7. The exisiting ActiveServerConnection
is:
ActiveServerConnectionInfo:
Metadata:158-1-131-48/158.1.132.19:9000
Version:145720623220907

[2012-03-07 20:51:45,872] [DEBUG] [RS_OPEN_REGION-158-1-131-48,20020,1331107668635-20] [org.apache.hadoop.hbase.zookeeper.ZKAssign
849] regionserver:20020-0x135ec32b39e0002-0x135ec32b39e0002 Successfully transitioned node
91bf3e6f8adb2e4b335f061036353126 from M_ZK_REGION_OFFLINE to RS_ZK_REGION_OPENING
[2012-03-07 20:51:45,873] [DEBUG] [RS_OPEN_REGION-158-1-131-48,20020,1331107668635-20] [org.apache.hadoop.hbase.regionserver.HRegion
2649] Opening region: REGION => {NAME => 'test1,00088613810,1331112369360.91bf3e6f8adb2e4b335f061036353126.',
STARTKEY => '00088613810', ENDKEY => '00088613815', ENCODED => 91bf3e6f8adb2e4b335f061036353126,
TABLE => {{NAME => 'test1', FAMILIES => [{NAME => 'value', BLOOMFILTER => 'NONE',
REPLICATION_SCOPE => '0', VERSIONS => '3', COMPRESSION => 'GZ', TTL => '86400',
BLOCKSIZE => '655360', IN_MEMORY => 'false', BLOCKCACHE => 'true'}]}}
[2012-03-07 20:51:45,873] [DEBUG] [RS_OPEN_REGION-158-1-131-48,20020,1331107668635-20] [org.apache.hadoop.hbase.regionserver.HRegion
316] Instantiated test1,00088613810,1331112369360.91bf3e6f8adb2e4b335f061036353126.
[2012-03-07 20:51:45,874] [ERROR] [RS_OPEN_REGION-158-1-131-48,20020,1331107668635-20] [com.huawei.isap.ump.ha.client.RPCRetryAndSwitchInvoker
105] Exception occured while connecting to server : 
ActiveServerConnectionInfo:
Metadata:158-1-131-48/158.1.132.19:9000
Version:145720623220907

 



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