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zhihai xu updated YARN-2820: ---------------------------- Attachment: YARN-2820.002.patch > Improve FileSystemRMStateStore to customize hdfs client retries for > locateFollowingBlock and completeFile for better error recovery. > ------------------------------------------------------------------------------------------------------------------------------------ > > Key: YARN-2820 > URL: https://issues.apache.org/jira/browse/YARN-2820 > Project: Hadoop YARN > Issue Type: Improvement > Components: resourcemanager > Affects Versions: 2.5.0 > Reporter: zhihai xu > Assignee: zhihai xu > Attachments: YARN-2820.000.patch, YARN-2820.001.patch, > YARN-2820.002.patch > > > Improve FileSystemRMStateStore to customize hdfs client retries for > locateFollowingBlock and completeFile for better error recovery. > When we use FileSystemRMStateStore as yarn.resourcemanager.store.class, We > saw the following IOexception cause the RM shutdown. > {code} > 2014-10-29 23:49:12,202 INFO > org.apache.hadoop.yarn.server.resourcemanager.recovery.FileSystemRMStateStore: > Updating info for attempt: appattempt_1409135750325_109118_000001 at: > /tmp/hadoop-yarn/yarn/system/rmstore/FSRMStateRoot/RMAppRoot/application_1409135750325_109118/ > appattempt_1409135750325_109118_000001 > 2014-10-29 23:49:19,495 INFO org.apache.hadoop.hdfs.DFSClient: Could not > complete > /tmp/hadoop-yarn/yarn/system/rmstore/FSRMStateRoot/RMAppRoot/application_1409135750325_109118/ > appattempt_1409135750325_109118_000001.new.tmp retrying... > 2014-10-29 23:49:23,757 INFO org.apache.hadoop.hdfs.DFSClient: Could not > complete > /tmp/hadoop-yarn/yarn/system/rmstore/FSRMStateRoot/RMAppRoot/application_1409135750325_109118/ > appattempt_1409135750325_109118_000001.new.tmp retrying... > 2014-10-29 23:49:31,120 INFO org.apache.hadoop.hdfs.DFSClient: Could not > complete > /tmp/hadoop-yarn/yarn/system/rmstore/FSRMStateRoot/RMAppRoot/application_1409135750325_109118/ > appattempt_1409135750325_109118_000001.new.tmp retrying... > 2014-10-29 23:49:46,283 INFO > org.apache.hadoop.yarn.server.resourcemanager.recovery.FileSystemRMStateStore: > Error updating info for attempt: appattempt_1409135750325_109118_000001 > java.io.IOException: Unable to close file because the last block does not > have enough number of replicas. > 2014-10-29 23:49:46,284 ERROR > org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore: > Error storing/updating appAttempt: appattempt_1409135750325_109118_000001 > 2014-10-29 23:49:46,916 FATAL > org.apache.hadoop.yarn.server.resourcemanager.ResourceManager: > Received a org.apache.hadoop.yarn.server.resourcemanager.RMFatalEvent of type > STATE_STORE_OP_FAILED. Cause: > java.io.IOException: Unable to close file because the last block does not > have enough number of replicas. > at > org.apache.hadoop.hdfs.DFSOutputStream.completeFile(DFSOutputStream.java:2132) > > at org.apache.hadoop.hdfs.DFSOutputStream.close(DFSOutputStream.java:2100) > at > org.apache.hadoop.fs.FSDataOutputStream$PositionCache.close(FSDataOutputStream.java:70) > > at org.apache.hadoop.fs.FSDataOutputStream.close(FSDataOutputStream.java:103) > at > org.apache.hadoop.yarn.server.resourcemanager.recovery.FileSystemRMStateStore.writeFile(FileSystemRMStateStore.java:522) > > at > org.apache.hadoop.yarn.server.resourcemanager.recovery.FileSystemRMStateStore.updateFile(FileSystemRMStateStore.java:534) > > at > org.apache.hadoop.yarn.server.resourcemanager.recovery.FileSystemRMStateStore.updateApplicationAttemptStateInternal(FileSystemRMStateStore.java:389) > at > org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore.handleStoreEvent(RMStateStore.java:675) > > at > org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore$ForwardingEventHandler.handle(RMStateStore.java:766) > > at > org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore$ForwardingEventHandler.handle(RMStateStore.java:761) > > at > org.apache.hadoop.yarn.event.AsyncDispatcher.dispatch(AsyncDispatcher.java:173) > > at > org.apache.hadoop.yarn.event.AsyncDispatcher$1.run(AsyncDispatcher.java:106) > at java.lang.Thread.run(Thread.java:744) > {code} > It will be better to Improve FileSystemRMStateStore to configure > "dfs.client.block.write.locateFollowingBlock.retries" to a bigger value for > better error recovery. > The default value for "dfs.client.block.write.locateFollowingBlock.retries" > is 5. > {code} > public static final int > DFS_CLIENT_BLOCK_WRITE_LOCATEFOLLOWINGBLOCK_RETRIES_DEFAULT = 5; > {code} -- This message was sent by Atlassian JIRA (v6.3.4#6332)