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From "Sergey Shelukhin (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-6748) Endless recursive of deleteNode happened in SplitLogManager#DeleteAsyncCallback
Date Tue, 15 Jan 2013 21:58:13 GMT

    [ https://issues.apache.org/jira/browse/HBASE-6748?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13554417#comment-13554417
] 

Sergey Shelukhin commented on HBASE-6748:
-----------------------------------------

About the first one, sure, looked at it wrong, should be safe because Set will not allow multiple
entries with the same path so remove will not remove multiple entries. However, what will
happen if there are multiple deletes for the same path and they fail in parallel?
                
> Endless recursive of deleteNode happened in SplitLogManager#DeleteAsyncCallback
> -------------------------------------------------------------------------------
>
>                 Key: HBASE-6748
>                 URL: https://issues.apache.org/jira/browse/HBASE-6748
>             Project: HBase
>          Issue Type: Bug
>          Components: master
>    Affects Versions: 0.94.1, 0.96.0
>            Reporter: Jieshan Bean
>            Assignee: Jeffrey Zhong
>             Fix For: 0.96.0, 0.94.5
>
>         Attachments: hbase-6748_1.patch, hbase-6748.patch
>
>
> You can ealily understand the problem from the below logs:
> {code}
> [2012-09-01 11:41:02,062] [WARN ] [MASTER_SERVER_OPERATIONS-xh03,20000,1339549619270-1]
[org.apache.hadoop.hbase.master.SplitLogManager$CreateAsyncCallback 978] create rc =SESSIONEXPIRED
for /hbase/splitlog/hdfs%3A%2F%2Fxh01%3A9000%2Fhbase%2F.logs%2Fxh01%2C20020%2C1339552105088-splitting%2Fxh01%252C20020%252C1339552105088.1339557014846
remaining retries=3
> [2012-09-01 11:41:02,062] [WARN ] [MASTER_SERVER_OPERATIONS-xh03,20000,1339549619270-1]
[org.apache.hadoop.hbase.master.SplitLogManager$CreateAsyncCallback 978] create rc =SESSIONEXPIRED
for /hbase/splitlog/hdfs%3A%2F%2Fxh01%3A9000%2Fhbase%2F.logs%2Fxh01%2C20020%2C1339552105088-splitting%2Fxh01%252C20020%252C1339552105088.1339557014846
remaining retries=2
> [2012-09-01 11:41:02,063] [WARN ] [MASTER_SERVER_OPERATIONS-xh03,20000,1339549619270-1]
[org.apache.hadoop.hbase.master.SplitLogManager$CreateAsyncCallback 978] create rc =SESSIONEXPIRED
for /hbase/splitlog/hdfs%3A%2F%2Fxh01%3A9000%2Fhbase%2F.logs%2Fxh01%2C20020%2C1339552105088-splitting%2Fxh01%252C20020%252C1339552105088.1339557014846
remaining retries=1
> [2012-09-01 11:41:02,063] [WARN ] [MASTER_SERVER_OPERATIONS-xh03,20000,1339549619270-1]
[org.apache.hadoop.hbase.master.SplitLogManager$CreateAsyncCallback 978] create rc =SESSIONEXPIRED
for /hbase/splitlog/hdfs%3A%2F%2Fxh01%3A9000%2Fhbase%2F.logs%2Fxh01%2C20020%2C1339552105088-splitting%2Fxh01%252C20020%252C1339552105088.1339557014846
remaining retries=0
> [2012-09-01 11:41:02,063] [WARN ] [MASTER_SERVER_OPERATIONS-xh03,20000,1339549619270-1]
[org.apache.hadoop.hbase.master.SplitLogManager 393] failed to create task node/hbase/splitlog/hdfs%3A%2F%2Fxh01%3A9000%2Fhbase%2F.logs%2Fxh01%2C20020%2C1339552105088-splitting%2Fxh01%252C20020%252C1339552105088.1339557014846
> [2012-09-01 11:41:02,063] [WARN ] [MASTER_SERVER_OPERATIONS-xh03,20000,1339549619270-1]
[org.apache.hadoop.hbase.master.SplitLogManager 353] Error splitting /hbase/splitlog/hdfs%3A%2F%2Fxh01%3A9000%2Fhbase%2F.logs%2Fxh01%2C20020%2C1339552105088-splitting%2Fxh01%252C20020%252C1339552105088.1339557014846
> [2012-09-01 11:41:02,063] [WARN ] [MASTER_SERVER_OPERATIONS-xh03,20000,1339549619270-1]
[org.apache.hadoop.hbase.master.SplitLogManager$DeleteAsyncCallback 1052] delete rc=SESSIONEXPIRED
for /hbase/splitlog/hdfs%3A%2F%2Fxh01%3A9000%2Fhbase%2F.logs%2Fxh01%2C20020%2C1339552105088-splitting%2Fxh01%252C20020%252C1339552105088.1339557014846
remaining retries=9223372036854775807
> [2012-09-01 11:41:02,064] [WARN ] [MASTER_SERVER_OPERATIONS-xh03,20000,1339549619270-1]
[org.apache.hadoop.hbase.master.SplitLogManager$DeleteAsyncCallback 1052] delete rc=SESSIONEXPIRED
for /hbase/splitlog/hdfs%3A%2F%2Fxh01%3A9000%2Fhbase%2F.logs%2Fxh01%2C20020%2C1339552105088-splitting%2Fxh01%252C20020%252C1339552105088.1339557014846
remaining retries=9223372036854775806
> [2012-09-01 11:41:02,064] [WARN ] [MASTER_SERVER_OPERATIONS-xh03,20000,1339549619270-1]
[org.apache.hadoop.hbase.master.SplitLogManager$DeleteAsyncCallback 1052] delete rc=SESSIONEXPIRED
for /hbase/splitlog/hdfs%3A%2F%2Fxh01%3A9000%2Fhbase%2F.logs%2Fxh01%2C20020%2C1339552105088-splitting%2Fxh01%252C20020%252C1339552105088.1339557014846
remaining retries=9223372036854775805
> [2012-09-01 11:41:02,064] [WARN ] [MASTER_SERVER_OPERATIONS-xh03,20000,1339549619270-1]
[org.apache.hadoop.hbase.master.SplitLogManager$DeleteAsyncCallback 1052] delete rc=SESSIONEXPIRED
for /hbase/splitlog/hdfs%3A%2F%2Fxh01%3A9000%2Fhbase%2F.logs%2Fxh01%2C20020%2C1339552105088-splitting%2Fxh01%252C20020%252C1339552105088.1339557014846
remaining retries=9223372036854775804
> [2012-09-01 11:41:02,065] [WARN ] [MASTER_SERVER_OPERATIONS-xh03,20000,1339549619270-1]
[org.apache.hadoop.hbase.master.SplitLogManager$DeleteAsyncCallback 1052] delete rc=SESSIONEXPIRED
for /hbase/splitlog/hdfs%3A%2F%2Fxh01%3A9000%2Fhbase%2F.logs%2Fxh01%2C20020%2C1339552105088-splitting%2Fxh01%252C20020%252C1339552105088.1339557014846
remaining retries=9223372036854775803
> ...................
> [2012-09-01 11:41:03,307] [ERROR] [MASTER_SERVER_OPERATIONS-xh03,20000,1339549619270-1]
[org.apache.zookeeper.ClientCnxn 623] Caught unexpected throwable
> java.lang.StackOverflowError
> {code}

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