[jira] [Commented] (HBASE-8670) [0.94] Backport HBASE-8449,HBASE-8204 and HBASE-8699 to 0.94 (Refactor recoverLease retries and pauses)

["Hudson (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-8670?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13727387#comment-13727387 ] 

Hudson commented on HBASE-8670:
-------------------------------

SUCCESS: Integrated in HBase-0.94-security #240 (See [https://builds.apache.org/job/HBase-0.94-security/240/])
HBASE-8670 [0.94] Backport HBASE-8449,HBASE-8204 and HBASE-8699 to 0.94 (Refactor recoverLease retries and pauses) (enis: rev 1509532)
* /hbase/branches/0.94/src/main/java/org/apache/hadoop/hbase/util/FSHDFSUtils.java
* /hbase/branches/0.94/src/main/resources/hbase-default.xml
* /hbase/branches/0.94/src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestHLog.java
* /hbase/branches/0.94/src/test/java/org/apache/hadoop/hbase/util/TestFSHDFSUtils.java

                
> [0.94] Backport HBASE-8449,HBASE-8204 and HBASE-8699 to 0.94 (Refactor recoverLease retries and pauses)
> -------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-8670
>                 URL: https://issues.apache.org/jira/browse/HBASE-8670
>             Project: HBase
>          Issue Type: Bug
>          Components: Filesystem Integration, master, wal
>            Reporter: Enis Soztutar
>            Assignee: Enis Soztutar
>             Fix For: 0.94.11
>
>         Attachments: hbase-8670_v1.patch, hbase-8670_v2.patch
>
>
> Some history: 
>  Up until 0.94.8, Hbase did not check the result of recoverLease() call, but things kind of worked since we are checking for 0-length files in distributed log split tasks from region servers. If lease recovery is not finished, the log file will report 0 length, and the task will fail, and master will then re-call recoverLease() and reassign the task. This scheme might fail for log files that are larger than 1 hdfs block though. 
>  In 0.94.8, we committed (HBASE-8354, which is backport of HBASE-7878) and later increased the sleep time to 4 secs in HBASE-8389. 
>  However, the proper solution arrived in trunk in HBASE-8449 which uses a backoff sleep policy + isFileClosed() api. We should backport this patch to 0.94 as well. 
> isFileClosed() is released in Hadoop 1.2.0 (HDFS-4774) and 2.0.5(HDFS-4525).

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