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From "Xiaoyu Yao (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-8531) Append failed due to unreleased lease from previous appender with quota exceeded exception
Date Thu, 04 Jun 2015 04:45:38 GMT
Xiaoyu Yao created HDFS-8531:
--------------------------------

             Summary: Append failed due to unreleased lease from previous appender with quota
exceeded exception
                 Key: HDFS-8531
                 URL: https://issues.apache.org/jira/browse/HDFS-8531
             Project: Hadoop HDFS
          Issue Type: Bug
            Reporter: Xiaoyu Yao


Append operation fails if
1. Set SpaceQuota to 3G for /user/hrt_qa/heterogenous
2. Copy 1GB file to /user/hrt_qa/heterogenous
3. Run 'hdfs dfs -appendToFile' to append 1GB file to the already copied 1GB file in /user/hrt_qa/heterogenous
4. Append fails with Quota exceed message
5. Increase the Quota to 5G for /user/hrt_qa/heterogenous
6. Run the Append message again and the following error message comes.
{code}
appendToFile: Failed to APPEND_FILE /user/hrt_qa/quotaPerHerterogenousStorage/1GBFile_1/part-m-00000
for DFSClient_NONMAPREDUCE_1431576997_1 on 172.31.37.190 because this file lease is currently
owned by DFSClient_NONMAPREDUCE_-231994503_1 on 172.31.37.190
{code}
7. Wait for a while (lease soft limit -- 1 min) and retry append it succeeds after the previous
lease expire. 

This seems to relate to HDFS-7587
"
When a client was trying to append to the file, the remaining space quota was very small.
This caused a failure in prepareFileForWrite(), but after the inode was already converted
for writing and a lease added. Since these were not undone when the quota violation was detected,
the file was left in under-construction with an active lease without edit logging OP_ADD.
A subsequent append() eventually caused a lease recovery after the soft limit period. This
resulted in commitBlockSynchronization(), which closed the file with OP_CLOSE being logged."

The fix in HDFS-7587 addressed the edit log corruption issue but does not handle the problem
within soft limit period where other clients can't append.




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