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Re: current direction in namenode HA - HDFS - [mail # dev]
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...small correction: This is for your Option 4: you can take a look at HDFS-3077 In this umbrella JIRA, work is going actively. @Ted, thanks for adding th...
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Author: Uma Maheswara Rao G,
2012-09-04, 23:17
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Re: current direction in namenode HA - HDFS - [mail # dev]
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...Hi Sujee, Thanks a lot for your interest on HA. for #1 If you can invest on NFS filers, it is another option. If you want to try this, you can use released Hadoop-2 version...
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Author: Uma Maheswara Rao G,
2012-09-04, 23:09
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[HDFS-3854] Implement a fence method which should fence the BK shared storage. - HDFS - [issue]
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...Currently when machine down or network down, SSHFence can not ensure that, other node is completely down. So, fence will fail and switch will not happen.[ internally we did work around to re...
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http://issues.apache.org/jira/browse/HDFS-3854
Author: Uma Maheswara Rao G,
2012-09-01, 19:58
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[HDFS-2695] ReadLock should be enough for FsNameSystem#renewLease. - HDFS - [issue]
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...When checking the issue HDFS-1241, found this point.Since renewLease is not updating any nameSystem related data, can we make this lock to read lock?am i missing some thing here?...
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http://issues.apache.org/jira/browse/HDFS-2695
Author: Uma Maheswara Rao G,
2012-08-30, 17:28
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[HDFS-2330] In NNStorage.java, IOExceptions of stream closures can mask root exceptions. - HDFS - [issue]
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...In NNStorage.java: There are many stream closures in finally block. There is a chance that they can mask the root exceptions.So, better to follow the pattern like belo...
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http://issues.apache.org/jira/browse/HDFS-2330
Author: Uma Maheswara Rao G,
2012-08-16, 00:20
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[HDFS-3287] 'hdfs -format' should be able to initialize non-file journal managers. - HDFS - [issue]
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...This is the JIRA to support the formatting of shared dirs.for more details see HDFS-3275....
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http://issues.apache.org/jira/browse/HDFS-3287
Author: Uma Maheswara Rao G,
2012-08-01, 14:07
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Block missing issues in stress testing - HDFS - [mail # dev]
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...Hi Devs, We have seen couple of Block missing issues in stress testing. ( mostly al l were with default configurations ) 1) HDFS-3584 Blocks are getting marked as corrupt with ...
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Author: Uma Maheswara Rao G,
2012-07-20, 18:47
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[HDFS-2827] Cannot save namespace after renaming a directory above a file with an open lease - HDFS - [issue]
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...When i execute the following operations and wait for checkpoint to complete.fs.mkdirs(new Path("/test1"));FSDataOutputStream create = fs.create(new Path("/test/abc.txt")); //dont closefs.ren...
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http://issues.apache.org/jira/browse/HDFS-2827
Author: Uma Maheswara Rao G,
2012-07-10, 19:13
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[HDFS-3122] Block recovery with closeFile flag true can race with blockReport. Due to this blocks are getting marked as corrupt. - HDFS - [issue]
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...Block Report can race with Block Recovery with closeFile flag true. Block report generated just before block recovery at DN side and due to N/W problems, block report got delayed to NN....
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http://issues.apache.org/jira/browse/HDFS-3122
Author: Uma Maheswara Rao G,
2012-07-02, 09:01
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[HDFS-3464] BKJM: Deleting currentLedger and leaving 'inprogress_x' on exceptions can throw BKNoSuchLedgerExistsException later. - HDFS - [issue]
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...HDFS-3058 will clean currentLedgers on exception.In BookKeeperJournalManager, startLogSegment() is deleting the corresponding 'inprogress_ledger' ledger on exception. Here leaving the 'inpro...
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http://issues.apache.org/jira/browse/HDFS-3464
Author: Uma Maheswara Rao G,
2012-06-25, 16:08
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