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[HDFS-4295] Using port 1023 should be valid when starting Secure DataNode - HDFS - [issue]
...In SecureDataNodeStarter:if ((ss.getLocalPort() >= 1023 || listener.getPort() >= 1023) &&        UserGroupInformation.isSecurityEnabled()) {  ...
http://issues.apache.org/jira/browse/HDFS-4295    Author: Stephen Chu, 2012-12-11, 14:09
[HDFS-4281] NameNode recovery does not detect NN RPC address on HA cluster - HDFS - [issue]
...On a shut down HA cluster, I ran "hdfs namenode -recover" and encountered:You have selected Metadata Recovery mode.  This mode is intended to recover lost metadata on a corrupt filesyst...
http://issues.apache.org/jira/browse/HDFS-4281    Author: Stephen Chu, 2012-12-06, 02:05
[HDFS-4026] Improve error message for dfsadmin -refreshServiceAcl - HDFS - [issue]
...I ran hdfs dfsadmin -refreshServiceAcl on a cluster that did not have Service Level Authorization enabled:[schu@cs-10-20-90-154 ~]$ hdfs dfsadmin -refreshServiceAclrefreshServiceAcl: [schu@c...
http://issues.apache.org/jira/browse/HDFS-4026    Author: Stephen Chu, 2012-11-20, 21:40
[HDFS-3813] Log error message if security and WebHDFS are enabled but principal/keytab are not configured - HDFS - [issue]
...I configured a secure HDFS cluster, but failed to start the NameNode because I had enabled WebHDFS without specifying dfs.web.authentication.kerberos.principal in hdfs-site.xml.In the NN log...
http://issues.apache.org/jira/browse/HDFS-3813    Author: Stephen Chu, 2012-11-16, 23:22
[HDFS-3921] NN will prematurely consider blocks missing when entering active state while still in safe mode - HDFS - [issue]
...I shut down all the HDFS daemons in an Highly Available (automatic failover) cluster.Then I started one NN and it transitioned it to active. No DNs were started, and I saw the red warning li...
http://issues.apache.org/jira/browse/HDFS-3921    Author: Stephen Chu, 2012-11-13, 14:03
[HDFS-4048] Use ERROR instead of INFO for volume failure logs - HDFS - [issue]
...I misconfigured the permissions of the DataNode data directories (they were owned by root, instead of hdfs).I wasn't aware of this misconfiguration until a few days later. I usually search t...
http://issues.apache.org/jira/browse/HDFS-4048    Author: Stephen Chu, 2012-11-09, 14:02
[HDFS-4085] HttpFs/WebHDFS don't handle multiple forward slashes in beginning of path - HDFS - [issue]
...I used double forward slashes when specifying the path while using WebHDFS and got an invalid path exception:webhdfs:[schu@cs-10-20-81-73 hadoop]$ curl -i -X PUT "http://cs-10-20-81-73.cloud...
http://issues.apache.org/jira/browse/HDFS-4085    Author: Stephen Chu, 2012-10-19, 19:54
[HDFS-3840] JournalNodes log JournalNotFormattedException backtrace error before being formatted - HDFS - [issue]
...I started 3 JournalNodes for the first time. Then I formatted the NN. The JournalNodes, log the following error backtrace:[root@cs-10-20-193-121 ~]# sudo -u hdfs hdfs journalnode12/08/22 00:...
http://issues.apache.org/jira/browse/HDFS-3840    Author: Stephen Chu, 2012-09-11, 07:34
[HDFS-3052] HA: hdfs balancer throws StandbyException - HDFS - [issue]
...The hdfs balancer tool throws a StandbyException.Originally, styx01 hosts the active NN and styx02 hosts the standby NN.After failing over from styx01 NN to styx02 NN, the hdfs balancer comm...
http://issues.apache.org/jira/browse/HDFS-3052    Author: Stephen Chu, 2012-06-12, 13:23
[HDFS-3065] HA: Newly active NameNode does not recognize decommissioning DataNode - HDFS - [issue]
...I'm working on a cluster where, originally, styx01 hosts the active NameNode and styx02 hosts the standby NameNode. In both styx01's and styx02's exclude file, I added the DataNode on styx03...
http://issues.apache.org/jira/browse/HDFS-3065    Author: Stephen Chu, 2012-04-03, 18:24
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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