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[HDFS-8428] Erasure Coding: Fix the NullPointerException when deleting file - HDFS - [issue]
...In HDFS, when removing some file, NN will also remove all its blocks from BlocksMap, and send DNA_INVALIDATE (invalidate blocks) commands to datanodes.  After datanodes successfully del...
http://issues.apache.org/jira/browse/HDFS-8428    Author: Yi Liu, 2015-05-20, 01:26
[HDFS-8418] Fix the isNeededReplication calculation for Striped block in NN - HDFS - [issue]
...Currently when calculating isNeededReplication for striped block, we use BlockCollection#getPreferredBlockReplication to get expected replica number for striped block. See an example:public ...
http://issues.apache.org/jira/browse/HDFS-8418    Author: Yi Liu, 2015-05-19, 03:16
[HDFS-8398] Erasure Coding: Correctly calculate last striped block length in DFSStripedInputStream if it's under construction. - HDFS - [issue]
...Currently in DFSStripedInputStream, for continuous block, if it's under construction, we need to read the block replica length from one of datanode and use it as last block length.For stripe...
http://issues.apache.org/jira/browse/HDFS-8398    Author: Yi Liu, 2015-05-14, 06:51
[HDFS-8363] Erasure Coding: DFSStripedInputStream#seekToNewSource - HDFS - [issue]
...Ideally, for striped block, an internal block is only on one datanode, so DFSStripedInputStream#seekToNewSource should return false, we should overwrite DFSInputStream#seekToNewSource for st...
http://issues.apache.org/jira/browse/HDFS-8363    Author: Yi Liu, 2015-05-13, 01:54
[HDFS-8376] Erasure Coding: Update last cellsize calculation according to whether the erasure codec has chunk boundary - HDFS - [issue]
...Current calculation for last cell size is as following. For parity cell, the last cell size is the same as the first data cell.  But some erasure codec has chunk boundary, then the last...
http://issues.apache.org/jira/browse/HDFS-8376    Author: Yi Liu, 2015-05-12, 13:16
[HDFS-8203] Erasure Coding: Seek and other Ops in DFSStripedInputStream. - HDFS - [issue]
...In HDFS-7782 and HDFS-8033, we handle pread and stateful read for DFSStripedInputStream, we also need handle other operations, such as seek, zerocopy read ......
http://issues.apache.org/jira/browse/HDFS-8203    Author: Yi Liu, 2015-05-11, 02:06
[HDFS-8329] Erasure coding: Rename Striped block recovery to reconstruction to eliminate confusion. - HDFS - [issue]
...Both in NN and DN, we use striped block recovery and sometime use reconstruction.The striped block recovery make people confused with block recovery, we should use striped block reconstructi...
http://issues.apache.org/jira/browse/HDFS-8329    Author: Yi Liu, 2015-05-07, 13:30
[HDFS-6885] Fix wrong use of BytesWritable in FSEditLogOp#RenameOp - HDFS - [issue]
...After readField using BytesWritable, the data length should be writable.getLength(), instead of writable.getBytes().length which is the buffer length. This will cause returned Rename[] is lo...
http://issues.apache.org/jira/browse/HDFS-6885    Author: Yi Liu, 2015-05-03, 23:16
[HDFS-6782] Improve FS editlog logSync - HDFS - [issue]
...In NN, it uses a double buffer (bufCurrent, bufReady) for log sync, bufCurrent it to buffer new coming edit ops and bufReady is for flushing. This's efficient. When flush is ongoing, and buf...
http://issues.apache.org/jira/browse/HDFS-6782    Author: Yi Liu, 2015-05-03, 16:33
[HDFS-8223] Should calculate checksum for parity blocks in DFSStripedOutputStream - HDFS - [issue]
...DFSPacket p = createPacket(packetSize, chunksPerPacket,          streamer.getBytesCurBlock(),          streamer.getAndIncCurrentSe...
http://issues.apache.org/jira/browse/HDFS-8223    Author: Yi Liu, 2015-04-24, 07:51
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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB