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[HDFS-3800] QJM: improvements to QJM fault testing - HDFS - [issue]
...This JIRA improves TestQJMWithFaults as follows: the current implementation didn't properly unwrap exceptions thrown by the reflection-based injection method. This caused some issues in the ...
http://issues.apache.org/jira/browse/HDFS-3800    Author: Todd Lipcon, 2012-08-16, 06:19
[HDFS-3797] QJM: add segment txid as a parameter to journal() RPC - HDFS - [issue]
...During fault testing of QJM, I saw the following issue:1) NN sends txn 5 to JN2) NN gets partitioned from JN while JN remains up. The next two RPCs are missed while the partition has happene...
http://issues.apache.org/jira/browse/HDFS-3797    Author: Todd Lipcon, 2012-08-16, 06:14
[HDFS-3190] Simple refactors in existing NN code to assist QuorumJournalManager extension - HDFS - [issue]
...This JIRA is for some simple refactors in the NN: refactor the code which writes the seen_txid file in NNStorage into a new "LongContainingFile" utility class. This is useful for the Journal...
http://issues.apache.org/jira/browse/HDFS-3190    Author: Todd Lipcon, 2012-08-16, 00:20
[HDFS-1075] Separately configure connect timeouts from read timeouts in data path - HDFS - [issue]
...The timeout configurations in the write pipeline overload the read timeout to also include a connect timeout. In my experience, if a node is down it can take many seconds to get back an exce...
http://issues.apache.org/jira/browse/HDFS-1075    Author: Todd Lipcon, 2012-08-15, 19:40
[HDFS-3799] QJM: handle empty log segments during recovery - HDFS - [issue]
...One of the cases not yet handled in the QJM branch is the one where either the writer or the journal node crashes after startLogSegment() but before it has written its first transaction to t...
http://issues.apache.org/jira/browse/HDFS-3799    Author: Todd Lipcon, 2012-08-15, 11:57
[HDFS-3798] Avoid throwing NPE when finalizeSegment() is called on invalid segment - HDFS - [issue]
...Currently, if the client calls finalizeLogSegment() on a segment which doesn't exist on the JournalNode side, it throws an NPE. Instead it should throw a more intelligible exception....
http://issues.apache.org/jira/browse/HDFS-3798    Author: Todd Lipcon, 2012-08-15, 11:55
[HDFS-3793] Implement genericized format() in QJM - HDFS - [issue]
...HDFS-3695 added the ability for non-File journal managers to tie into calls like NameNode -format. This JIRA is to implement format() for QuorumJournalManager....
http://issues.apache.org/jira/browse/HDFS-3793    Author: Todd Lipcon, 2012-08-15, 11:53
[HDFS-3795] QJM: validate journal dir at startup - HDFS - [issue]
...Currently, the JN does not validate the configured journal directory until it tries to write into it. This is counter-intuitive for users, since they would expect to find out about a misconf...
http://issues.apache.org/jira/browse/HDFS-3795    Author: Todd Lipcon, 2012-08-15, 11:52
[HDFS-1057] Concurrent readers hit ChecksumExceptions if following a writer to very end of file - HDFS - [issue]
...In BlockReceiver.receivePacket, it calls replicaInfo.setBytesOnDisk before calling flush(). Therefore, if there is a concurrent reader, it's possible to race here - the reader will see the n...
http://issues.apache.org/jira/browse/HDFS-1057    Author: Todd Lipcon, 2012-08-14, 11:59
[HDFS-3721] hsync support broke wire compatibility - HDFS - [issue]
...HDFS-744 added support for hsync to the data transfer wire protocol. However, it actually broke wire compatibility: if the client has hsync support but the server does not, the client cannot...
http://issues.apache.org/jira/browse/HDFS-3721    Author: Todd Lipcon, 2012-08-10, 09:44
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