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https://issues.apache.org/jira/browse/HBASE-17245?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15721735#comment-15721735
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Hudson commented on HBASE-17245:
--------------------------------
FAILURE: Integrated in Jenkins build HBase-Trunk_matrix #2076 (See
[https://builds.apache.org/job/HBase-Trunk_matrix/2076/])
HBASE-17245 Replace HTableDescriptor#htd.getColumnFamilies().length with
(anoopsamjohn: rev e10baacd3e3e0c46ad4a0473990b682ed834c5f5)
* (edit)
hbase-client/src/main/java/org/apache/hadoop/hbase/HTableDescriptor.java
* (edit)
hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/ModifyTableProcedure.java
* (edit) hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java
* (edit)
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java
* (edit)
hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestReplicaWithCluster.java
* (edit)
hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/DeleteColumnFamilyProcedure.java
* (edit)
hbase-server/src/test/java/org/apache/hadoop/hbase/master/procedure/TestDeleteColumnFamilyProcedureFromClient.java
* (edit)
hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/RestoreSnapshotProcedure.java
* (edit)
hbase-it/src/test/java/org/apache/hadoop/hbase/IntegrationTestDDLMasterFailover.java
* (edit)
hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/CreateTableProcedure.java
* (edit)
hbase-server/src/test/java/org/apache/hadoop/hbase/wal/WALPerformanceEvaluation.java
> Replace HTableDescriptor#htd.getColumnFamilies().length with a low-cost
> implementation
> --------------------------------------------------------------------------------------
>
> Key: HBASE-17245
> URL: https://issues.apache.org/jira/browse/HBASE-17245
> Project: HBase
> Issue Type: Improvement
> Affects Versions: 2.0.0
> Reporter: huaxiang sun
> Assignee: huaxiang sun
> Priority: Minor
> Fix For: 2.0.0
>
> Attachments: HBASE-17245-master-001.patch
>
>
> Found quite a few places doing something like
> {code}
> if (htd.getColumnFamilies().length == 0) {
> {code}
> HTableDescriptor#htd.getColumnFamilies() does a few memory allocations. The
> purpose is to get the family number, it can be replaced with
> {code}
> + public int getColumnFamilyCount() {
> + return families.size();
> + }
> {code}
> in HTableDescriptor which does not need these memory allocations.
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