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[HDFS-2882] DN continues to start up, even if block pool fails to initialize - HDFS - [issue]
...I started a DN on a machine that was completely out of space on one of its drives. I saw the following:2012-02-02 09:56:50,499 FATAL org.apache.hadoop.hdfs.server.datanode.DataNode: Initiali...
http://issues.apache.org/jira/browse/HDFS-2882    Author: Todd Lipcon, 2015-02-13, 19:59
[HDFS-3519] Checkpoint upload may interfere with a concurrent saveNamespace - HDFS - [issue]
...TestStandbyCheckpoints failed in precommit build 2620 due to the following issue: both nodes were in Standby state, and configured to checkpoint "as fast as possible" NN1 starts to save its ...
http://issues.apache.org/jira/browse/HDFS-3519    Author: Todd Lipcon, 2015-01-23, 15:23
[HDFS-956] Improper synchronization in some FSNamesystem methods - HDFS - [issue]
...There are some methods in FSNamesystem that check isInSafeMode while not synchronized, and then proceed to perform operations. Thus the actual operations can occur after the NN has entered s...
http://issues.apache.org/jira/browse/HDFS-956    Author: Todd Lipcon, 2015-01-20, 00:48
[HDFS-2825] Add test hook to turn off the writer preferring its local DN - HDFS - [issue]
...Currently, the default block placement policy always places the first replica in the pipeline on the local node if there is a valid DN running there. In some network designs, within-rack ban...
http://issues.apache.org/jira/browse/HDFS-2825    Author: Todd Lipcon, 2014-12-16, 19:19
[HDFS-3342] SocketTimeoutException in BlockSender.sendChunks could have a better error message - HDFS - [issue]
...Currently, if a client connects to a DN and begins to read a block, but then stops calling read() for a long period of time, the DN will log a SocketTimeoutException "480000 millis timeout w...
http://issues.apache.org/jira/browse/HDFS-3342    Author: Todd Lipcon, 2014-10-31, 15:15
[HDFS-3528] Use native CRC32 in DFS write path - HDFS - [issue]
...HDFS-2080 improved the CPU efficiency of the read path by using native SSE-enabled code for CRC verification. Benchmarks of the write path show that it's often CPU bound by checksums as well...
http://issues.apache.org/jira/browse/HDFS-3528    Author: Todd Lipcon, 2014-09-05, 10:45
[HDFS-3755] Creating an already-open-for-write file with overwrite=true fails - HDFS - [issue]
...If a file is already open for write by one client, and another client calls fs.create() with overwrite=true, the file should be deleted and the new file successfully created. Instead, it is ...
http://issues.apache.org/jira/browse/HDFS-3755    Author: Todd Lipcon, 2014-09-04, 01:59
[HDFS-3796] Speed up edit log tests by avoiding fsync() - HDFS - [issue]
...Our edit log tests are very slow because they incur a lot of fsyncs as they write out transactions. Since fsync() has no effect except in the case of power outages or system crashes, and we ...
http://issues.apache.org/jira/browse/HDFS-3796    Author: Todd Lipcon, 2014-09-04, 01:59
[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, 2014-09-04, 01:59
[HDFS-3245] Add metrics and web UI for cluster version summary - HDFS - [issue]
...With the introduction of protocol compatibility, once HDFS-2983 is committed, we have the possibility that different nodes in a cluster are running different software versions. To aid operat...
http://issues.apache.org/jira/browse/HDFS-3245    Author: Todd Lipcon, 2014-09-04, 00:49
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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