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[HDFS-6031] NN running newer software rejects loading the fsimage during rolling upgrade. - HDFS - [issue]
...During rolling upgrade, the standby NN that has a newer layout version will complain about that the fsimage is too old, and require starting the NN using the -upgrade option:File system imag...
http://issues.apache.org/jira/browse/HDFS-6031    Author: Haohui Mai, 2014-02-28, 19:35
[HDFS-6032] -rollingUpgrade query hits NPE after the NN restarts - HDFS - [issue]
...NamenodeRpcServer#rollingUpgrade throws an NPE during query after the NN restarts. It complains that the BlockPoolId in RollingUpgradeInfo equals to null.Further investigation shows that the...
http://issues.apache.org/jira/browse/HDFS-6032    Author: Haohui Mai, 2014-02-28, 01:26
[HDFS-6029] Secondary NN fails to checkpoint after -rollingUpgrade prepare - HDFS - [issue]
...If Secondary NN crashes right after calling dfsadmin -rollingUpgrade prepare, it fails to checkpoint because it fails to download the newest fsimage whose name is fsimage_rollback_txid.To re...
http://issues.apache.org/jira/browse/HDFS-6029    Author: Haohui Mai, 2014-02-28, 01:22
[HDFS-6024] Test whether the NN will reject the downgrade if it has a fsimage from a newer release - HDFS - [issue]
...This jira introduces a new unit test to ensure that the NN will bail out if it is presented with a fsimage generated by the newer release....
http://issues.apache.org/jira/browse/HDFS-6024    Author: Haohui Mai, 2014-02-26, 23:20
[HDFS-6023] Test whether the standby NN continues  to checkpoint after the prepare stage - HDFS - [issue]
...This jira introduces new unit test to ensure that the standby NN continues to checkpoint after it creates the rollback fsimage....
http://issues.apache.org/jira/browse/HDFS-6023    Author: Haohui Mai, 2014-02-26, 23:18
[HDFS-6019] Standby NN might not checkpoint when processing the rolling upgrade marker - HDFS - [issue]
...FsEditlogLoader will call FSNameSystem#triggerRollbackCheckpoint() when processing the rollback marker, which looks like the following:void triggerRollbackCheckpoint() {  if (stand...
http://issues.apache.org/jira/browse/HDFS-6019    Author: Haohui Mai, 2014-02-26, 18:21
[HDFS-6017] Query the status of rolling upgrade in the preparation stage in TestRollingUpgrade and TestRollingUpgradeRollback - HDFS - [issue]
...After HDFS-5778, the administrator needs to query the status of the rolling upgrade before he / she can proceed.The unit tests need to be modified to reflect this change....
http://issues.apache.org/jira/browse/HDFS-6017    Author: Haohui Mai, 2014-02-26, 00:14
[HDFS-5525] Inline dust templates - HDFS - [issue]
...Currently the dust templates are stored as separate files on the server side. The web UI has to make separate HTTP requests to load the templates, which increases the network overheads and p...
http://issues.apache.org/jira/browse/HDFS-5525    Author: Haohui Mai, 2014-02-24, 20:58
[HDFS-5382] Implement the UI of browsing filesystems in HTML 5 page - HDFS - [issue]
...The UI of browsing filesystems can be implemented as an HTML 5 application. The UI can pull the data from WebHDFS....
http://issues.apache.org/jira/browse/HDFS-5382    Author: Haohui Mai, 2014-02-24, 20:58
[HDFS-5775] Consolidate the code for serialization in CacheManager - HDFS - [issue]
...This jira proposes to consolidate the code that is responsible for serializing / deserializing cache manager state into a separate class, so that it is easier to introduce new code path to s...
http://issues.apache.org/jira/browse/HDFS-5775    Author: Haohui Mai, 2014-02-21, 14:52
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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