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[HDFS-7552] change FsVolumeList toString() to fix TestDataNodeVolumeFailureToleration - HDFS - [issue]
...see https://builds.apache.org/job/PreCommit-HDFS-Build/9088//testReport/org.apache.hadoop.hdfs.server.datanode/TestDataNodeVolumeFailureToleration/testValidVolumesAtStartup/Per my understand...
http://issues.apache.org/jira/browse/HDFS-7552    Author: Liang Xie, 2014-12-19, 19:23
[HDFS-7553] fix the TestDFSUpgradeWithHA due to BindException - HDFS - [issue]
...see https://builds.apache.org/job/PreCommit-HDFS-Build/9092//testReport/org.apache.hadoop.hdfs.server.namenode.ha/TestDFSUpgradeWithHA/testNfsUpgrade/ :Error MessagePort in use: localhost:57...
http://issues.apache.org/jira/browse/HDFS-7553    Author: Liang Xie, 2014-12-19, 18:54
[HDFS-7523] Setting a socket receive buffer size in DFSClient - HDFS - [issue]
...It would be nice if we have a socket receive buffer size while creating socket from client(HBase) view, in old version it should be in DFSInputStream, in trunk it seems should be at: &n...
http://issues.apache.org/jira/browse/HDFS-7523    Author: Liang Xie, 2014-12-19, 08:41
[HDFS-7551] Fix the new findbugs warning from TransferFsImage - HDFS - [issue]
...There is a findbug warning in https://builds.apache.org/job/PreCommit-HDFS-Build/9080//artifact/patchprocess/newPatchFindbugsWarningshadoop-hdfs.html , Bug type RV_RETURN_VALUE_IGNORED_BAD_P...
http://issues.apache.org/jira/browse/HDFS-7551    Author: Liang Xie, 2014-12-19, 07:51
[HDFS-6735] A minor optimization to avoid pread() be blocked by read() inside the same DFSInputStream - HDFS - [issue]
...In current DFSInputStream impl, there're a couple of coarser-grained locks in read/pread path, and it has became a HBase read latency pain point so far. In HDFS-6698, i made a minor patch ag...
http://issues.apache.org/jira/browse/HDFS-6735    Author: Liang Xie, 2014-12-13, 00:44
[HDFS-6698] try to optimize DFSInputStream.getFileLength() - HDFS - [issue]
...HBase prefers to invoke read() serving scan request, and invoke pread() serving get reqeust. Because pread() almost holds no lock.Let's image there's a read() running, because the definition...
http://issues.apache.org/jira/browse/HDFS-6698    Author: Liang Xie, 2014-11-04, 10:31
[HDFS-6617] Flake TestDFSZKFailoverController.testManualFailoverWithDFSHAAdmin due to a long edit log sync op - HDFS - [issue]
...Just Hit a false alarm testing while working at  HDFS-6614, see https://builds.apache.org/job/PreCommit-HDFS-Build/7259//testReport/org.apache.hadoop.hdfs.server.namenode.ha/TestDFSZKFa...
http://issues.apache.org/jira/browse/HDFS-6617    Author: Liang Xie, 2014-09-03, 20:50
[HDFS-6627] Rename DataNode#checkWriteAccess to checkReadAccess. - HDFS - [issue]
...Just read getReplicaVisibleLength() code and found it, DataNode.checkWriteAccess is only invoked by DataNode.getReplicaVisibleLength(), let's rename it to checkReadAccess to avoid confusing,...
http://issues.apache.org/jira/browse/HDFS-6627    Author: Liang Xie, 2014-09-03, 20:50
[HDFS-6638] shorten test run time with a smaller retry timeout setting - HDFS - [issue]
...similiar with HDFS-6614, i think it's a general test duration optimization tip, so i grep "IOException, will wait for" from a full test run under hdfs project, found several test cases could...
http://issues.apache.org/jira/browse/HDFS-6638    Author: Liang Xie, 2014-09-03, 20:50
[HDFS-6766] optimize ack notify mechanism to avoid thundering herd issue - HDFS - [issue]
...Currently, DFSOutputStream uses wait/notifyAll to coordinate ack receiving and ack waiting, etc..say there're 5 threads(t1,t2,t3,t4,t5) wait for ack seq no: 1,2,3,4,5, once the no. 1 ack arr...
http://issues.apache.org/jira/browse/HDFS-6766    Author: Liang Xie, 2014-08-07, 22:04
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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