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Posted to notifications@accumulo.apache.org by "Josh Elser (JIRA)" <ji...@apache.org> on 2015/05/05 00:05:07 UTC
[jira] [Updated] (ACCUMULO-3772) WAL prematurely deleted for root
table
[ https://issues.apache.org/jira/browse/ACCUMULO-3772?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Josh Elser updated ACCUMULO-3772:
---------------------------------
Environment: SHA1 2436eec237dc23608e91cae56777a323e2f77295 (I believe). Running with Kerberos on. HDFS 2.7.1-SNAPSHOT
> WAL prematurely deleted for root table
> --------------------------------------
>
> Key: ACCUMULO-3772
> URL: https://issues.apache.org/jira/browse/ACCUMULO-3772
> Project: Accumulo
> Issue Type: Bug
> Components: gc, tserver
> Environment: SHA1 2436eec237dc23608e91cae56777a323e2f77295 (I believe). Running with Kerberos on. HDFS 2.7.1-SNAPSHOT
> Reporter: Josh Elser
> Assignee: Josh Elser
> Priority: Blocker
> Fix For: 1.7.0
>
>
> I have a 5-node test system which I ran all of the ITs against.
> When I came back to the cluster later, I observed the following:
> * Multiple running MinCs against accumulo.metadata that weren't running
> * {{accumulo.root}} without an online tablet
> * Multiple queued FATE ops (PopulateMetadata blocked).
> Ultimately, found that recovery was repeatedly failing (without any notification on the monitor, mind you).
> {noformat}
> 2015-05-04 21:44:16,151 [state.ZooTabletStateStore] DEBUG: root tablet log hdfs://os-hdp-2-3-amb-r6-1430724014-sec-accumulo-1-2.novalocal:8020/apps/accumulo/data/wal/os-hdp-2-3-amb-r6-1430724014-sec-accumulo-1-4.novalocal+9997/fc0e8426-
> f295-40d7-888e-f4b7dde1f966
> 2015-05-04 21:44:16,151 [state.ZooTabletStateStore] DEBUG: root tablet log hdfs://os-hdp-2-3-amb-r6-1430724014-sec-accumulo-1-2.novalocal:8020/apps/accumulo/data/wal/os-hdp-2-3-amb-r6-1430724014-sec-accumulo-1-6.novalocal+9997/a1a2c22f-
> f90d-4542-ab24-3ebdfa5d6fe4
> 2015-05-04 21:44:16,152 [state.ZooTabletStateStore] DEBUG: root tablet log hdfs://os-hdp-2-3-amb-r6-1430724014-sec-accumulo-1-2.novalocal:8020/apps/accumulo/data/wal/os-hdp-2-3-amb-r6-1430724014-sec-accumulo-1-5.novalocal+9997/088e3c39-
> f19e-4f43-bfc6-82f978b8ccb2
> 2015-05-04 21:44:16,152 [state.ZooTabletStateStore] DEBUG: Returning root tablet state: +r<<@(null,null,os-hdp-2-3-amb-r6-1430724014-sec-accumulo-1-6.novalocal:9997[34d1e090f8c0004])
> 2015-05-04 21:44:16,152 [master.Master] DEBUG: Root Table location State: +r<<@(null,null,os-hdp-2-3-amb-r6-1430724014-sec-accumulo-1-6.novalocal:9997[34d1e090f8c0004])
> 2015-05-04 21:44:16,152 [recovery.RecoveryManager] DEBUG: Recovering hdfs://os-hdp-2-3-amb-r6-1430724014-sec-accumulo-1-2.novalocal:8020/apps/accumulo/data/wal/os-hdp-2-3-amb-r6-1430724014-sec-accumulo-1-4.novalocal+9997/fc0e8426-f295-4
> 0d7-888e-f4b7dde1f966 to hdfs://os-hdp-2-3-amb-r6-1430724014-sec-accumulo-1-2.novalocal:8020/apps/accumulo/data/recovery/fc0e8426-f295-40d7-888e-f4b7dde1f966
> 2015-05-04 21:44:16,171 [recovery.RecoveryManager] DEBUG: Recovering hdfs://os-hdp-2-3-amb-r6-1430724014-sec-accumulo-1-2.novalocal:8020/apps/accumulo/data/wal/os-hdp-2-3-amb-r6-1430724014-sec-accumulo-1-6.novalocal+9997/a1a2c22f-f90d-4
> 542-ab24-3ebdfa5d6fe4 to hdfs://os-hdp-2-3-amb-r6-1430724014-sec-accumulo-1-2.novalocal:8020/apps/accumulo/data/recovery/a1a2c22f-f90d-4542-ab24-3ebdfa5d6fe4
> 2015-05-04 21:44:16,174 [recovery.RecoveryManager] DEBUG: Recovering hdfs://os-hdp-2-3-amb-r6-1430724014-sec-accumulo-1-2.novalocal:8020/apps/accumulo/data/wal/os-hdp-2-3-amb-r6-1430724014-sec-accumulo-1-5.novalocal+9997/088e3c39-f19e-4
> f43-bfc6-82f978b8ccb2 to hdfs://os-hdp-2-3-amb-r6-1430724014-sec-accumulo-1-2.novalocal:8020/apps/accumulo/data/recovery/088e3c39-f19e-4f43-bfc6-82f978b8ccb2
> {noformat}
> Note *088e3c39-f19e-4f43-bfc6-82f978b8ccb2*. Eventually we see that the file is gone:
> {noformat}
> 2015-05-04 21:45:15,647 [recovery.RecoveryManager] DEBUG: Unable to initate log sort for hdfs://os-hdp-2-3-amb-r6-1430724014-sec-accumulo-1-2.novalocal:8020/apps/accumulo/data/wal/os-hdp-2-3-amb-r6-1430724014-sec-accumulo-1-5.novalocal+9997/088e3c39-f19e-4f43-bfc6-82f978b8ccb2: java.io.FileNotFoundException: File does not exist: /apps/accumulo/data/wal/os-hdp-2-3-amb-r6-1430724014-sec-accumulo-1-5.novalocal+9997/088e3c39-f19e-4f43-bfc6-82f978b8ccb2
> at org.apache.hadoop.hdfs.server.namenode.INodeFile.valueOf(INodeFile.java:71)
> at org.apache.hadoop.hdfs.server.namenode.INodeFile.valueOf(INodeFile.java:61)
> at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.recoverLease(FSNamesystem.java:2828)
> at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.recoverLease(NameNodeRpcServer.java:666)
> at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.recoverLease(ClientNamenodeProtocolServerSideTranslatorPB.java:663)
> at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
> at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:616)
> at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:969)
> at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2049)
> at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2045)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:415)
> at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657)
> at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2043)
> {noformat}
> The most likely candidate to direct hatred towards is the GC
> {noformat}
> [root@os-hdp-2-3-amb-r6-1430724014-sec-accumulo-1-2 accumulo]# fgrep 088e3c39-f19e-4f43-bfc6-82f978b8ccb2 gc_os-hdp-2-3-amb-r6-1430724014-sec-accumulo-1-2.novalocal.debug.log
> 2015-05-04 08:30:15,210 [gc.GarbageCollectWriteAheadLogs] INFO : Checking replication table for hdfs://os-hdp-2-3-amb-r6-1430724014-sec-accumulo-1-2.novalocal:8020/apps/accumulo/data/wal/os-hdp-2-3-amb-r6-1430724014-sec-accumulo-1-5.novalocal+9997/088e3c39-f19e-4f43-bfc6-82f978b8ccb2
> 2015-05-04 08:30:15,223 [gc.GarbageCollectWriteAheadLogs] DEBUG: WAL not needed for replication hdfs://os-hdp-2-3-amb-r6-1430724014-sec-accumulo-1-2.novalocal:8020/apps/accumulo/data/wal/os-hdp-2-3-amb-r6-1430724014-sec-accumulo-1-5.novalocal+9997/088e3c39-f19e-4f43-bfc6-82f978b8ccb2
> 2015-05-04 08:30:15,268 [gc.GarbageCollectWriteAheadLogs] DEBUG: Removing unused WAL for server os-hdp-2-3-amb-r6-1430724014-sec-accumulo-1-5.novalocal:9997[14d1df69c910000] log hdfs://os-hdp-2-3-amb-r6-1430724014-sec-accumulo-1-2.novalocal:8020/apps/accumulo/data/wal/os-hdp-2-3-amb-r6-1430724014-sec-accumulo-1-5.novalocal+9997/088e3c39-f19e-4f43-bfc6-82f978b8ccb2
> {noformat}
> Sure enough, the GC deleted the file. I'll be digging from here...
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