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[HDFS-6285] tidy an error log inside BlockReceiver - HDFS - [issue]
...From this log from our production cluster:2014-04-22,10:39:05,476 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: IOException in BlockReceiver constructor. Cause is After reading code,...
http://issues.apache.org/jira/browse/HDFS-6285    Author: Liang Xie, 2014-04-25, 10:32
[HDFS-6284] don't let checkDiskError() run concurrently - HDFS - [issue]
...In current codebase, there're amount of  datanode.checkDiskError calls,  so it possible occurs that not a few threads call checkDiskError concurrently. IMHO, it'll be more reasonab...
http://issues.apache.org/jira/browse/HDFS-6284    Author: Liang Xie, 2014-04-25, 03:42
[HDFS-6108] make the length of the range in sync_file_range() configurable - HDFS - [issue]
...Current codebase has a hard code value for sync_file_range system call, we'd better to make it configurable, since different scenario probably has a different/better value for it. (ps: i fou...
http://issues.apache.org/jira/browse/HDFS-6108    Author: Liang Xie, 2014-03-19, 02:34
[HDFS-5917] Have an ability to refresh deadNodes list periodically - HDFS - [issue]
...In current HBase + HDFS trunk impl, if one node is added into deadNodes map, before deadNodes.clear() be invoked, this node could not be chosen any more. When i fixed HDFS-5637, i had a raw ...
http://issues.apache.org/jira/browse/HDFS-5917    Author: Liang Xie, 2014-03-04, 05:18
[HDFS-5637] try to refeatchToken while local read InvalidToken occurred - HDFS - [issue]
...we observed several warning logs like below from region server nodes:2013-12-05,13:22:26,042 WARN org.apache.hadoop.hdfs.DFSClient: Failed to connect to /10.2.201.110:11402 for block, add to...
http://issues.apache.org/jira/browse/HDFS-5637    Author: Liang Xie, 2014-02-03, 17:06
[HDFS-5727] introduce a self-maintaining io queue handling mechanism - HDFS - [issue]
...Currently the datanode read/write SLA is difficult to be guaranteed for HBase online requirement. One of major reasons is we don't support io priority or io request reorder inside datanode.I...
http://issues.apache.org/jira/browse/HDFS-5727    Author: Liang Xie, 2014-01-22, 01:53
[HDFS-5766] In DFSInputStream, do not add datanode to deadNodes after InvalidEncryptionKeyException in fetchBlockByteRange - HDFS - [issue]
...Found this issue when i read fetchBlockByteRange code:If we hit InvalidEncryptionKeyException, current logic is:1) reduce the retry count2) clearDataEncryptionKey3) addToDeadNodes4) retry in...
http://issues.apache.org/jira/browse/HDFS-5766    Author: Liang Xie, 2014-01-16, 13:41
[HDFS-5663] make the retry time and interval value configurable in openInfo() - HDFS - [issue]
...The original idea raised from Michael here: https://issues.apache.org/jira/browse/HDFS-1605?focusedCommentId=13846972&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpane...
http://issues.apache.org/jira/browse/HDFS-5663    Author: Liang Xie, 2013-12-19, 19:54
[HDFS-5664] try to relieve the BlockReaderLocal read() synchronized hotspot - HDFS - [issue]
...Current the BlockReaderLocal's read has a synchronized modifier:public synchronized int read(byte[] buf, int off, int len) throws IOException {In a HBase physical read heavy cluster, we obse...
http://issues.apache.org/jira/browse/HDFS-5664    Author: Liang Xie, 2013-12-16, 01:59
[HDFS-5652] refactoring/uniforming invalid block token exception handling in DFSInputStream - HDFS - [issue]
...See comments from Junping and Colin's from HDFS-5637...
http://issues.apache.org/jira/browse/HDFS-5652    Author: Liang Xie, 2013-12-13, 14:47
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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