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[HDFS-4816] transitionToActive blocks if the SBN is doing checkpoint image transfer - HDFS - [issue]
...The NN and SBN do this dance during checkpoint image transfer with nested HTTP GETs via HttpURLConnection. When an admin does a -transitionToActive during this transfer, part of that is inte...
http://issues.apache.org/jira/browse/HDFS-4816    Author: Andrew Wang, 2014-04-14, 20:01
[HDFS-6069] Quash stack traces when ACLs are disabled - HDFS - [issue]
...When ACLs are disabled, I get a lot of stack traces in the namenode log. It'd be nice to quash them for less spew.14/03/06 13:56:53 INFO ipc.Server: IPC Server handler 9 on 8020, call org.ap...
http://issues.apache.org/jira/browse/HDFS-6069    Author: Andrew Wang, 2014-04-10, 14:12
[HDFS-5936] MiniDFSCluster does not clean data left behind by SecondaryNameNode. - HDFS - [issue]
...Seen this happen on a few Jenkins precommit runs:java.io.IOException: Inconsistent checkpoint fields.LV = -52 namespaceID = 1980502516 cTime = 0 ; clusterId = testClusterID ; blockpoolId = B...
http://issues.apache.org/jira/browse/HDFS-5936    Author: Andrew Wang, 2014-04-10, 14:12
[HDFS-5591] Checkpointing should use monotonic time when calculating period - HDFS - [issue]
...Both StandbyCheckpointer and SecondaryNameNode use Time.now rather than Time.monotonicNow to calculate how long it's been since the last checkpoint. This can lead to issues when the system t...
http://issues.apache.org/jira/browse/HDFS-5591    Author: Andrew Wang, 2014-04-02, 14:32
[HDFS-5683] Better audit log messages for caching operations - HDFS - [issue]
...Right now the caching audit logs aren't that useful, e.g.2013-12-18 14:14:54,423 INFO  FSNamesystem.audit (FSNamesystem.java:logAuditMessage(7362)) - allowed=true ugi=andrew (auth:SIMPL...
http://issues.apache.org/jira/browse/HDFS-5683    Author: Andrew Wang, 2014-03-30, 04:58
[HDFS-5988] Bad fsimage always generated after upgrade - HDFS - [issue]
...Internal testing revealed an issue where, after upgrading from an earlier release, we always fail to save a correct PB-based fsimage (namely, missing inodes leading to an inconsistent namesp...
http://issues.apache.org/jira/browse/HDFS-5988    Author: Andrew Wang, 2014-03-25, 20:48
[HDFS-6151] HDFS should refuse to cache blocks >=2GB - HDFS - [issue]
...If you try to cache a block that's >=2GB, the DN will silently fail to cache it since MappedByteBuffer uses a signed int to represent size. Blocks this large are rare, but we should log o...
http://issues.apache.org/jira/browse/HDFS-6151    Author: Andrew Wang, 2014-03-24, 20:46
[HDFS-6093] Expose more caching information for debugging by users - HDFS - [issue]
...When users submit a new cache directive, it's unclear if the NN has recognized it and is actively trying to cache it, or if it's hung for some other reason. It'd be nice to expose a "pending...
http://issues.apache.org/jira/browse/HDFS-6093    Author: Andrew Wang, 2014-03-20, 21:25
[HDFS-6068] Disallow snapshot names that are also invalid directory names - HDFS - [issue]
...There are a number of restrictions on valid names in HDFS. For example, you can't name a directory "." or "..", or something containing a ":".However, I can happily create a snapshot named "...
http://issues.apache.org/jira/browse/HDFS-6068    Author: Andrew Wang, 2014-03-19, 14:59
[HDFS-6122] Rebalance cached replicas between datanodes - HDFS - [issue]
...It'd be nice if the NameNode was able to rebalance cache usage among datanodes. This would help avoid situations where the only three DNs with a replica are full and there is still cache spa...
http://issues.apache.org/jira/browse/HDFS-6122    Author: Andrew Wang, 2014-03-19, 01:46
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