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https://issues.apache.org/jira/browse/ACCUMULO-4535?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15752304#comment-15752304
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Adam J Shook commented on ACCUMULO-4535:
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I don't see any changes in the Blame around that part. Master [1] calls the
{{init#ServerConfigurationFactory}} which is not what the regex load balancer
is overriding [2], and the {{TabletBalancer}} doesn't call the other init
function.
[1]
https://github.com/apache/accumulo/blob/1.7/server/master/src/main/java/org/apache/accumulo/master/Master.java#L589
[2]
https://github.com/apache/accumulo/blob/rel/1.7.2/server/base/src/main/java/org/apache/accumulo/server/master/balancer/HostRegexTableLoadBalancer.java#L257
[3]
https://github.com/apache/accumulo/blob/1.7/server/base/src/main/java/org/apache/accumulo/server/master/balancer/TabletBalancer.java#L57
I don't think it is the same as ACCUMULO-4196 -- not enough details in that
ticket to tell. It fails trying to get assignments:
{code}
2016-12-15 13:35:55,349 [master.Master] ERROR: Error processing table state for
store Root Table
java.lang.NullPointerException
at
org.apache.accumulo.server.master.balancer.HostRegexTableLoadBalancer.getPoolNamesForHost(HostRegexTableLoadBalancer.java:142)
at
org.apache.accumulo.server.master.balancer.HostRegexTableLoadBalancer.splitCurrentByRegex(HostRegexTableLoadBalancer.java:108)
at
org.apache.accumulo.server.master.balancer.HostRegexTableLoadBalancer.getAssignments(HostRegexTableLoadBalancer.java:266)
at
org.apache.accumulo.master.TabletGroupWatcher.flushChanges(TabletGroupWatcher.java:745)
at
org.apache.accumulo.master.TabletGroupWatcher.run(TabletGroupWatcher.java:295)
{code}
> HostRegexTableLoadBalancer fails with NullPointerException
> ----------------------------------------------------------
>
> Key: ACCUMULO-4535
> URL: https://issues.apache.org/jira/browse/ACCUMULO-4535
> Project: Accumulo
> Issue Type: Bug
> Affects Versions: 1.7.2
> Reporter: Adam J Shook
> Assignee: Adam J Shook
>
> Ran into an issue when testing out the {{HostRegexTableLoadBalancer}}. It
> fails to start and throws a {{NullPointerException}} when trying to access
> the {{poolNameToRegexPattern}}. The root cause is the {{init}} function the
> load balancer overrides is the wrong one that the Master calls (wrong
> signature).
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