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[HDFS-6901] Remove unnecessary CryptoCodec and KeyProvider.Options definition in FSNamesystem - HDFS - [issue]
...CryptoCodec and KeyProvider.Options are not necessary in FSN....
http://issues.apache.org/jira/browse/HDFS-6901    Author: Yi Liu, 2014-08-28, 02:50
[HDFS-6870] Blocks and INodes could leak for Rename with overwrite flag - HDFS - [issue]
...Following code in FSDirectory#unprotectedRenameTo doesn't collect blocks and INodes for non snapshot path.        if (removedDst != null) {      ...
http://issues.apache.org/jira/browse/HDFS-6870    Author: Yi Liu, 2014-08-21, 20:44
[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, 2014-08-20, 09:46
[HDFS-6783] Fix HDFS CacheReplicationMonitor rescan logic - HDFS - [issue]
...In monitor thread, needsRescan is set to false before real scan starts, so for waitForRescanIfNeeded will return for the first condition:if (!needsRescan) {  return;}...
http://issues.apache.org/jira/browse/HDFS-6783    Author: Yi Liu, 2014-08-20, 01:01
[HDFS-6846] NetworkTopology#sortByDistance should give nodes higher priority, which cache the block. - HDFS - [issue]
...Currently there are 3 weights: local same rack off rackBut if some nodes cache the block, then it's faster if client read block from these nodes. So we should have some more weights as follo...
http://issues.apache.org/jira/browse/HDFS-6846    Author: Yi Liu, 2014-08-18, 22:15
[HDFS-6784] Avoid rescan twice in HDFS CacheReplicationMonitor for one FS Op if it calls setNeedsRescan multiple times. - HDFS - [issue]
...In HDFS CacheReplicationMonitor,  rescan is expensive. Sometimes, setNeedsRescan is called multiple times, for example, in FSNamesystem#modifyCacheDirective, there are 3 times. In monit...
http://issues.apache.org/jira/browse/HDFS-6784    Author: Yi Liu, 2014-08-14, 05:56
[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, 2014-08-07, 17:26
[HDFS-6817] Fix findbugs and other warnings - HDFS - [issue]
...We need to fix the findbugs and other warnings before merge....
http://issues.apache.org/jira/browse/HDFS-6817    Author: Yi Liu, 2014-08-06, 05:45
[HDFS-6813] WebHdfsFileSystem#OffsetUrlInputStream should implement PositionedReadable with thead-safe. - HDFS - [issue]
...PositionedReadable definition requires the implementations for its interfaces should be thread-safe.OffsetUrlInputStream(WebHdfsFileSystem inputstream) doesn't implement these interfaces wit...
http://issues.apache.org/jira/browse/HDFS-6813    Author: Yi Liu, 2014-08-05, 17:03
[HDFS-6787] Remove duplicate code in FSDirectory#unprotectedConcat - HDFS - [issue]
...// update inodeMapremoveFromInodeMap(Arrays.asList(allSrcInodes));this snippet of code is duplicate, since we already have the logic above it:    for(INodeFile nodeToRemove: a...
http://issues.apache.org/jira/browse/HDFS-6787    Author: Yi Liu, 2014-08-05, 14:23
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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