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[HBASE-6838] Regionserver may generate identical scanner name - HBase - [issue]
...In current implementation of HRegionserver#addScanner, it may generate same scanner name, thus make scanner confusion....
http://issues.apache.org/jira/browse/HBASE-6838    Author: chunhui shen, 2012-09-20, 00:40
[HBASE-6399] MetricsContext should be different between RegionServerMetrics and RegionServerDynamicMetrics - HBase - [issue]
...In hadoop-metrics.properties, GangliaContext is optional metrics context, I think we will use ganglia to monitor hbase cluster generally.However, I find a serious problem:RegionServerDynamic...
http://issues.apache.org/jira/browse/HBASE-6399    Author: chunhui shen, 2012-09-07, 19:45
[HBASE-6587] Region would be assigned twice in the case of all RS offline - HBase - [issue]
...In the TimeoutMonitor, we would act on time out for the regions if (this.allRegionServersOffline && !noRSAvailable)The code is as the following:if (regionState.getStamp() + timeout &...
http://issues.apache.org/jira/browse/HBASE-6587    Author: chunhui shen, 2012-09-05, 01:57
[HBASE-4988] MetaServer crash cause all splitting regionserver abort - HBase - [issue]
...If metaserver crash now,All the splitting regionserver will abort theirself.Becasue the codethis.journal.add(JournalEntry.PONR);MetaEditor.offlineParentInMeta(server.getCatalogTracker(),&nbs...
http://issues.apache.org/jira/browse/HBASE-4988    Author: chunhui shen, 2012-08-30, 16:55
[HBASE-5121] MajorCompaction may affect scan's correctness - HBase - [issue]
...In our test, there are two families' keyvalue for one row.But we could find a infrequent problem when doing scan's next if majorCompaction happens concurrently.In the client's two continuous...
http://issues.apache.org/jira/browse/HBASE-5121    Author: chunhui shen, 2012-07-22, 19:07
[HBASE-6227] SSH and cluster startup  causes data loss - HBase - [issue]
...In AssignmentManager#processDeadServersAndRegionsInTransition, if servershutdownhandler is processing and master consider it cluster startup, master will assign all user regions, however, se...
http://issues.apache.org/jira/browse/HBASE-6227    Author: chunhui shen, 2012-06-28, 17:40
[HBASE-5918] Master will block forever at startup if root server dies between assigning root and assigning meta - HBase - [issue]
...When master is initializing, if root server died between assign root and assign meta, master will block at HMaster#assignRootAndMeta:assignmentManager.assignMeta();this.catalogTracker.waitFo...
http://issues.apache.org/jira/browse/HBASE-5918    Author: chunhui shen, 2012-06-23, 18:23
[HBASE-6204] Improvement for opening region on the regionserver - HBase - [issue]
...If one table has many regions, like 100k regions.We would find regionserver open region very slowly.Opening region in parallel on the rs will be closed to serially.The following code is the ...
http://issues.apache.org/jira/browse/HBASE-6204    Author: chunhui shen, 2012-06-13, 04:50
[HBASE-6016] ServerShutdownHandler#processDeadRegion could return false for disabling table regions - HBase - [issue]
...* @return Returns true if specified region should be assigned, false if not.   * @throws IOException   */  public static boolean processDeadRegion(HRegionInfo h...
http://issues.apache.org/jira/browse/HBASE-6016    Author: chunhui shen, 2012-06-01, 05:42
[HBASE-6065] Log for flush would append a non-sequential edit in the hlog, leading to possible data loss - HBase - [issue]
...After completing flush region, we will append a log edit in the hlog file through HLog#completeCacheFlush.public void completeCacheFlush(final byte [] encodedRegionName,     &...
http://issues.apache.org/jira/browse/HBASE-6065    Author: chunhui shen, 2012-05-29, 09:30
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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