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