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[HDFS-5394] fix race conditions in DN caching and uncaching - HDFS - [issue]
...The DN needs to handle situations where it is asked to cache the same replica more than once.  (Currently, it can actually do two mmaps and mlocks.)  It also needs to handle the si...
http://issues.apache.org/jira/browse/HDFS-5394    Author: Colin Patrick McCabe, 2013-11-08, 13:36
[HDFS-5166] caching PB cleanups - HDFS - [issue]
...Once we have a better idea of what we need in the RPCs, let's do some protobuf cleanups on the caching RPCs.  We may want to factor some fields out into a common type, for example....
http://issues.apache.org/jira/browse/HDFS-5166    Author: Colin Patrick McCabe, 2013-11-07, 22:08
[HDFS-5459] fix bootstrapStandby race condition introduced in HDFS-5080 - HDFS - [issue]
...In HDFS-5080, we added the ability to fetch the in-progress edit log from JournalNodes.  However, in some cases, BootstrapStandby can now fetch entries that have not made it to a quorum...
http://issues.apache.org/jira/browse/HDFS-5459    Author: Colin Patrick McCabe, 2013-11-05, 01:00
[HDFS-5400] DFS_CLIENT_MMAP_CACHE_THREAD_RUNS_PER_TIMEOUT constant is set to the wrong value - HDFS - [issue]
...DFS_CLIENT_MMAP_CACHE_THREAD_RUNS_PER_TIMEOUT is set to the wrong value.  It should be set to dfs.client.mmap.cache.thread.runs.per.timeout, but instead it is set to dfs.client.mmap.cac...
http://issues.apache.org/jira/browse/HDFS-5400    Author: Colin Patrick McCabe, 2013-10-23, 15:05
[HDFS-5378] In CacheReport, don't send genstamp and length on the wire - HDFS - [issue]
...As discussed in HDFS-5096, we don't need genstamp and block length when processing cache reports.  So let's not send them over the wire (it increases the size of cache reports to 3x wha...
http://issues.apache.org/jira/browse/HDFS-5378    Author: Colin Patrick McCabe, 2013-10-21, 20:30
[HDFS-5397] TestDecommission.testClusterStatsFederation failed with ConcurrentModificationException - HDFS - [issue]
...It seems like FsVolumeImpl#bpSlices is currently accessed and modified concurrently with no synchronization.See this todo:  void checkDirs() throws DiskErrorException {  ...
http://issues.apache.org/jira/browse/HDFS-5397    Author: Colin Patrick McCabe, 2013-10-21, 18:05
[HDFS-5358] Add replication field to PathBasedCacheDirective - HDFS - [issue]
...Add a 'replication' field to PathBasedCacheDirective, so that administrators can configure how many cached replicas of a block the cluster should try to maintain....
http://issues.apache.org/jira/browse/HDFS-5358    Author: Colin Patrick McCabe, 2013-10-17, 00:12
[HDFS-5359] Allow LightWeightGSet#Iterator to remove elements - HDFS - [issue]
...Small modification to GSet#Iterator so that it can remove elements....
http://issues.apache.org/jira/browse/HDFS-5359    Author: Colin Patrick McCabe, 2013-10-15, 01:20
[HDFS-5349] DNA_CACHE and DNA_UNCACHE should be by blockId only - HDFS - [issue]
...DNA_CACHE and DNA_UNCACHE should be by blockId only.  We don't need length and genstamp to know what the NN asked us to cache....
http://issues.apache.org/jira/browse/HDFS-5349    Author: Colin Patrick McCabe, 2013-10-14, 23:19
[HDFS-5348] Fix error message when dfs.datanode.max.locked.memory is improperly configured - HDFS - [issue]
...We need to fix the error message when dfs.datanode.max.locked.memory is improperly configured.  Currently it says the size is "less than the datanode's available RLIMIT_MEMLOCK limit" w...
http://issues.apache.org/jira/browse/HDFS-5348    Author: Colin Patrick McCabe, 2013-10-14, 21:07
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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