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[HDFS-1944] Reading of the previously synced data will fail if the last block got corrupted. - HDFS - [issue]
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...For example a file can comprise 5 blcoks . In that we have written 4.5 blocks and invoked sync. Reading of this 4.5 blocks will be successful at this point of time. ...
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http://issues.apache.org/jira/browse/HDFS-1944
Author: Uma Maheswara Rao G,
2013-05-09, 00:44
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[HDFS-4525] Provide an API for knowing that whether file is closed or not. - HDFS - [issue]
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...Currently recoverLease API will return true if file is already closed. Otherwise it will trigger internalLease recovery and return false. It may take some time to really complete this recove...
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http://issues.apache.org/jira/browse/HDFS-4525
Author: Uma Maheswara Rao G,
2013-04-29, 18:54
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[HDFS-4516] Client crash after block allocation and NN switch before lease recovery for the same file can cause readers to fail forever - HDFS - [issue]
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...If client crashes just after allocating block( blocks not yet created in DNs) and NN also switched after this, then new Namenode will not know about locs.Further details will be in comment....
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http://issues.apache.org/jira/browse/HDFS-4516
Author: Uma Maheswara Rao G,
2013-03-20, 08:16
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[HDFS-3091] Update the usage limitations of ReplaceDatanodeOnFailure policy in the config description for the smaller clusters. - HDFS - [issue]
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...When verifying the HDFS-1606 feature, Observed couple of issues.Presently the ReplaceDatanodeOnFailure policy satisfies even though we dont have enough DN to replcae in cluster and will be r...
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http://issues.apache.org/jira/browse/HDFS-3091
Author: Uma Maheswara Rao G,
2013-03-15, 02:28
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[HDFS-2434] TestNameNodeMetrics.testCorruptBlock fails intermittently - HDFS - [issue]
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...java.lang.AssertionError: Bad value for metric CorruptBlocks expected:<1> but was:<0> at org.junit.Assert.fail(Assert.java:91) at org.junit.Assert.failNotEquals(Assert.java:645) ...
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http://issues.apache.org/jira/browse/HDFS-2434
Author: Uma Maheswara Rao G,
2013-03-07, 12:42
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[HDFS-4526] If persistBlocks enabled in Namenode, hflush call can avoid persisting blocks with fsync - HDFS - [issue]
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...If persists blocks enabled/in HA, evenry getAdditionalBlock will persist the blocks.So, if user calls Hflush, then client can simply ensure data flushed to DNs and need not worry about fsync...
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http://issues.apache.org/jira/browse/HDFS-4526
Author: Uma Maheswara Rao G,
2013-03-05, 08:54
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RE: [Vote] Merge branch-trunk-win to trunk - HDFS - [mail # dev]
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...+1 (non-binding) Thanks a lot for the work done by Suresh and team of community! I don't think there will be much problems because of platform dependancy as our development is with Ja...
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Author: Uma Maheswara Rao G,
2013-03-01, 05:20
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[HDFS-4482] ReplicationMonitor thread can exit with NPE due to the race between delete and replication of same file. - HDFS - [issue]
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...Trace:java.lang.NullPointerException at org.apache.hadoop.hdfs.server.namenode.FSDirectory.getFullPathName(FSDirectory.java:1442) at org.apache.hadoop.hdfs.server.namenode.INode.getFullPathN...
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http://issues.apache.org/jira/browse/HDFS-4482
Author: Uma Maheswara Rao G,
2013-02-22, 14:05
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[HDFS-3222] DFSInputStream#openInfo should not silently get the length as 0 when locations length is zero for last partial block. - HDFS - [issue]
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...I have seen one situation with Hbase cluster.Scenario is as follows:1)1.5 blocks has been written and synced.2)Suddenly cluster has been restarted.Reader opened the file and trying to get th...
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http://issues.apache.org/jira/browse/HDFS-3222
Author: Uma Maheswara Rao G,
2013-02-20, 07:27
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[HDFS-2815] Namenode is not coming out of safemode when we perform ( NN crash + restart ) . Also FSCK report shows blocks missed. - HDFS - [issue]
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...When tested the HA(internal) with continuous switch with some 5mins gap, found some blocks missed and namenode went into safemode after next switch. After the analysis, i found t...
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http://issues.apache.org/jira/browse/HDFS-2815
Author: Uma Maheswara Rao G,
2012-12-03, 07:33
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