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Hudson commented on HBASE-21439: -------------------------------- Results for branch branch-1 [build #544 on builds.a.o|https://builds.apache.org/job/HBase%20Nightly/job/branch-1/544/]: (x) *{color:red}-1 overall{color}* ---- details (if available): (x) {color:red}-1 general checks{color} -- For more information [see general report|https://builds.apache.org/job/HBase%20Nightly/job/branch-1/544//General_Nightly_Build_Report/] (x) {color:red}-1 jdk7 checks{color} -- For more information [see jdk7 report|https://builds.apache.org/job/HBase%20Nightly/job/branch-1/544//JDK7_Nightly_Build_Report/] (x) {color:red}-1 jdk8 hadoop2 checks{color} -- For more information [see jdk8 (hadoop2) report|https://builds.apache.org/job/HBase%20Nightly/job/branch-1/544//JDK8_Nightly_Build_Report_(Hadoop2)/] (x) {color:red}-1 source release artifact{color} -- See build output for details. > StochasticLoadBalancer RegionLoads aren’t being used in RegionLoad cost > functions > --------------------------------------------------------------------------------- > > Key: HBASE-21439 > URL: https://issues.apache.org/jira/browse/HBASE-21439 > Project: HBase > Issue Type: Bug > Components: Balancer > Affects Versions: 1.3.2.1, 2.0.2 > Reporter: Ben Lau > Assignee: Ben Lau > Priority: Major > Fix For: 3.0.0, 1.5.0, 1.3.3, 2.2.0, 2.0.3, 1.4.9, 2.1.2 > > Attachments: HBASE-21439-addendum-master.patch, > HBASE-21439-branch-1.patch, HBASE-21439-branch-1.patch, > HBASE-21439-master.patch > > > In StochasticLoadBalancer.updateRegionLoad() the region loads are being put > into the map with Bytes.toString(regionName). > First, this is a problem because Bytes.toString() assumes that the byte array > is a UTF8 encoded String but there is no guarantee that regionName bytes are > legal UTF8. > Secondly, in BaseLoadBalancer.registerRegion, we are reading the region loads > out of the load map not using Bytes.toString() but using > region.getRegionNameAsString() and region.getEncodedName(). So the load > balancer will not see or use any of the cluster's RegionLoad history. > There are 2 primary ways to solve this issue, assuming we want to stay with > String keys for the load map (seems reasonable to aid debugging). We can > either fix updateRegionLoad to store the regionName as a string properly or > we can update both the reader & writer to use a new common valid String > representation. > Will post a patch assuming we want to pursue the original intention, i.e. > store regionNameAsAString for the loadmap key, but I'm open to fixing this a > different way. -- This message was sent by Atlassian JIRA (v7.6.3#76005)