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[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
[HDFS-5461] fallback to non-ssr(local short circuit reads) while oom detected - HDFS - [issue]
...Currently, the DirectBufferPool used by ssr feature seems doesn't have a upper-bound limit except DirectMemory VM option. So there's a risk to encounter direct memory oom. see HBASE-8143 for...
http://issues.apache.org/jira/browse/HDFS-5461    Author: Liang Xie, 2013-11-15, 00:27
[HDFS-4530] return buffer into direct bufferPool in BlockReaderLocal as possible - HDFS - [issue]
...  public synchronized void close() throws IOException {    dataIn.close();    if (checksumIn != null) {      checksumIn.close();&n...
http://issues.apache.org/jira/browse/HDFS-4530    Author: Liang Xie, 2013-07-03, 17:28
[HDFS-4419] retry while datanode register has a hostname resolution failures - HDFS - [issue]
...It should be relative with HDFS-3990, after applied HDFS-4068 and HDFS-3990 to CDH4.1.1, i found our test datanodes will register failed always. After applied the attached trivial patch, our...
http://issues.apache.org/jira/browse/HDFS-4419    Author: Liang Xie, 2013-05-29, 15:39
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