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[HDFS-3875] Issue handling checksum errors in write pipeline - HDFS - [issue]
...We saw this issue with one block in a large test cluster. The client is storing the data with replication level 2, and we saw the following: the second node in the pipeline detects a checksu...
http://issues.apache.org/jira/browse/HDFS-3875    Author: Todd Lipcon, 2014-09-04, 00:00
[HDFS-4477] Secondary namenode may retain old tokens - HDFS - [issue]
...Upon inspection of a fsimage created by a secondary namenode, we've discovered it contains very old tokens. These are probably the ones that were not explicitly canceled.  It may be rel...
http://issues.apache.org/jira/browse/HDFS-4477    Author: Kihwal Lee, 2014-09-04, 00:00
[HDFS-4714] Log short messages in Namenode RPC server for exceptions meant for clients - HDFS - [issue]
...Namenode can slow down significantly if a rogue client/job issues massive number of requests that will fail. E.g. permission denied, quota overage, etc.  The major contributing factor i...
http://issues.apache.org/jira/browse/HDFS-4714    Author: Kihwal Lee, 2014-09-04, 00:00
[HDFS-4807] DFSOutputStream.createSocketForPipeline() should not include timeout extension on connect - HDFS - [issue]
...In createSocketForPipeline(), connect() is called with a timeout set to (socket_timeout + read_extension * num_datanodes). Since it is simply connecting to a single node, it does not make se...
http://issues.apache.org/jira/browse/HDFS-4807    Author: Kihwal Lee, 2014-09-04, 00:00
[HDFS-4646] createNNProxyWithClientProtocol ignores configured timeout value - HDFS - [issue]
...The Client RPC I/O timeout mechanism appears to be configured by two core-site.xml paramters:1. A boolean ipc.client.ping2. A numeric value ipc.ping.intervalIf ipc.client.ping is true, then ...
http://issues.apache.org/jira/browse/HDFS-4646    Author: Jagane Sundar, 2014-09-03, 23:59
[HDFS-4699] TestPipelinesFailover#testPipelineRecoveryStress fails sporadically - HDFS - [issue]
...I have seen TestPipelinesFailover#testPipelineRecoveryStress fail sporadically due to timeout during loopRecoverLease, which waits for up to 30 seconds before timing out....
http://issues.apache.org/jira/browse/HDFS-4699    Author: Chris Nauroth, 2014-09-03, 23:58
[HDFS-4205] fsck fails with symlinks - HDFS - [issue]
...I created a symlink using...    FileContext fc = FileContext.getFileContext(dst.fs.getUri());    for (PathData src : srcs) {      fc.createS...
http://issues.apache.org/jira/browse/HDFS-4205    Author: Andy Isaacson, 2014-09-03, 23:58
[HDFS-4832] Namenode doesn't change the number of missing blocks in safemode when DNs rejoin or leave - HDFS - [issue]
...Courtesy Karri VRK Reddy!1. Namenode lost datanodes causing missing blocks2. Namenode was put in safe mode3. Datanode restarted on dead nodes 4. Waited for lots of time for the NN UI to refl...
http://issues.apache.org/jira/browse/HDFS-4832    Author: Ravi Prakash, 2014-09-03, 23:58
[HDFS-4862] SafeModeInfo.isManual() returns true when resources are low even if it wasn't entered into manually - HDFS - [issue]
...HDFS-1594 changed isManual to thisprivate boolean isManual() {  return extension == Integer.MAX_VALUE && !resourcesLow;}One immediate impact of this is that when resources ...
http://issues.apache.org/jira/browse/HDFS-4862    Author: Ravi Prakash, 2014-09-03, 23:58
[HDFS-4128] 2NN gets stuck in inconsistent state if edit log replay fails in the middle - HDFS - [issue]
...We saw the following issue in a cluster: The 2NN downloads an edit log segment:2012-10-29 12:30:57,433 INFO org.apache.hadoop.hdfs.server.namenode.FSImage: Reading /xxxxxxx/current/edits_000...
http://issues.apache.org/jira/browse/HDFS-4128    Author: Todd Lipcon, 2014-09-03, 23:55
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