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[HDFS-6247] Avoid timeouts for replaceBlock() call by sending intermediate responses to Balancer - HDFS - [issue]
...Currently there is no response sent from target Datanode to Balancer for the replaceBlock() calls.Since the Block movement for balancing is throttled, complete block movement will take time ...
http://issues.apache.org/jira/browse/HDFS-6247    Author: Vinayakumar B, 2014-04-15, 18:05
[HDFS-6147] New blocks scanning will be delayed due to issue in BlockPoolSliceScanner#updateBytesToScan(..) - HDFS - [issue]
...New blocks scanning will be delayed if old blocks deleted after datanode restart.Steps:1. Write some blocks and wait till all scans over2. Restart the datanode3. Delete some of the blocks4. ...
http://issues.apache.org/jira/browse/HDFS-6147    Author: Vinayakumar B, 2014-04-15, 11:14
[HDFS-5723] Append failed FINALIZED replica should not be accepted as valid when that block is underconstruction - HDFS - [issue]
...Scenario:1. 3 node cluster with dfs.client.block.write.replace-datanode-on-failure.enable set to false.2. One file is written with 3 replicas, blk_id_gs13. One of the datanode DN1 is down.4....
http://issues.apache.org/jira/browse/HDFS-5723    Author: Vinayakumar B, 2014-04-15, 09:06
[HDFS-6114] Block Scan log rolling will never happen if blocks written continuously leading to huge size of dncp_block_verification.log.curr - HDFS - [issue]
...1. BlockPoolSliceScanner#scan() will not return until all the blocks are scanned. 2. If the blocks (with size in several MBs) to datanode are written continuously then one iteration of Block...
http://issues.apache.org/jira/browse/HDFS-6114    Author: Vinayakumar B, 2014-04-15, 09:05
[HDFS-5669] Storage#tryLock() should check for null before logging successfull message - HDFS - [issue]
...In the following code in Storage#tryLock(), there is a possibility that file.getChannel().tryLock() returns null if the lock is acquired by some other process. In that case even though retur...
http://issues.apache.org/jira/browse/HDFS-5669    Author: Vinayakumar B, 2014-04-11, 16:00
[HDFS-6064] DFSConfigKeys.DFS_BLOCKREPORT_INTERVAL_MSEC_DEFAULT is not updated with latest block report interval of 6 hrs - HDFS - [issue]
...DFSConfigKeys.DFS_BLOCKREPORT_INTERVAL_MSEC_DEFAULT is not updated with latest block report interval of 6 hrswhere as hdfs-default.xml having value of 6hours...
http://issues.apache.org/jira/browse/HDFS-6064    Author: Vinayakumar B, 2014-04-10, 14:12
[HDFS-5728] [Diskfull] Block recovery will fail if the metafile does not have crc for all chunks of the block - HDFS - [issue]
...1. Client (regionsever) has opened stream to write its WAL to HDFS. This is not one time upload, data will be written slowly.2. One of the DataNode got diskfull ( due to some other data fill...
http://issues.apache.org/jira/browse/HDFS-5728    Author: Vinayakumar B, 2014-04-04, 20:36
[HDFS-5014] BPOfferService#processCommandFromActor() synchronization on namenode RPC call delays IBR to Active NN, if Stanby NN is unstable - HDFS - [issue]
...In one of our cluster, following has happened which failed HDFS write.1. Standby NN was unstable and continously restarting due to some errors. But Active NN was stable.2. MR Job was writing...
http://issues.apache.org/jira/browse/HDFS-5014    Author: Vinayakumar B, 2014-04-02, 03:06
[HDFS-6115] flush() should be called for every append on block scan verification log - HDFS - [issue]
...RollingLogsImpl#out is  PrintWriter and it have the default buffersize of 8kB.So until the 8kB buffer is filled all scan verification entries will not be flushed, hence there will be ch...
http://issues.apache.org/jira/browse/HDFS-6115    Author: Vinayakumar B, 2014-03-27, 14:02
[HDFS-6111] Avoid duplicate entries in Block Scan verification logs - HDFS - [issue]
...Duplicate entries could be generated in datanode verification logs if the datanode gets shutdown during the rolling of scan verification logs.If this happens multiple times in huge cluster, ...
http://issues.apache.org/jira/browse/HDFS-6111    Author: Vinayakumar B, 2014-03-18, 20:51
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