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https://issues.apache.org/jira/browse/HBASE-19619?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16304149#comment-16304149
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Ted Yu commented on HBASE-19619:
--------------------------------
bq. ns_set2 = java.util.HashSet.new(rpc.getNamespaces)
The above would result in:
{code}
Error:
^[[48;5;16;38;5;226;1mtest_append_peer_namespaces:_works_with_namespaces_array(Hbase::ReplicationAdminTest)^[[0m:
Java::JavaLang::NullPointerException:
java.util.HashSet.<init>(java/util/HashSet.java:119)
java.lang.reflect.Constructor.newInstance(java/lang/reflect/Constructor.java:423)
org.jruby.javasupport.JavaConstructor.newInstanceDirect(org/jruby/javasupport/JavaConstructor.java:278)
org.jruby.RubyClass.newInstance(org/jruby/RubyClass.java:1001)
org.jruby.RubyClass$INVOKER$i$newInstance.call(org/jruby/RubyClass$INVOKER$i$newInstance.gen)
RUBY.add_peer_namespaces(/Users/tyu/trunk/hbase-shell/src/main/ruby/hbase/replication_admin.rb:224)
RUBY.command(/Users/tyu/trunk/hbase-shell/src/main/ruby/shell/commands/append_peer_namespaces.rb:40)
org.jruby.RubyClass.finvoke(org/jruby/RubyClass.java:522)
org.jruby.RubyBasicObject.send19(org/jruby/RubyBasicObject.java:1680)
{code}
> Modify replication_admin.rb to use ReplicationPeerConfigBuilder
> ---------------------------------------------------------------
>
> Key: HBASE-19619
> URL: https://issues.apache.org/jira/browse/HBASE-19619
> Project: HBase
> Issue Type: Bug
> Reporter: Ted Yu
> Assignee: Ted Yu
> Priority: Critical
> Fix For: 2.0.0-beta-1
>
> Attachments: 19619.v1.txt, 19619.v2.txt, 19619.v3.txt, 19619.v4.txt,
> 19619.v5.txt, 19619.v7.txt, 19619.v8.txt
>
>
> Here is the error:
> {code}
> Error:
> test_append_peer_namespaces:_works_with_namespaces_array(Hbase::ReplicationAdminTest):
> Java::JavaLang::UnsupportedOperationException:
> java.util.Collections$UnmodifiableCollection.add(java/util/Collections.java:1055)
> java.lang.reflect.Method.invoke(java/lang/reflect/Method.java:498)
> org.jruby.javasupport.JavaMethod.invokeDirectWithExceptionHandling(org/jruby/javasupport/JavaMethod.java:453)
> org.jruby.javasupport.JavaMethod.invokeDirect(org/jruby/javasupport/JavaMethod.java:314)
> RUBY.block in
> add_peer_namespaces(/home/jenkins/jenkins-slave/workspace/HBase-Flaky-Tests/hbase-shell/src/main/ruby/hbase/replication_admin.rb:226)
> org.jruby.RubyArray.each(org/jruby/RubyArray.java:1734)
> org.jruby.RubyArray$INVOKER$i$0$0$each.call(org/jruby/RubyArray$INVOKER$i$0$0$each.gen)
> RUBY.add_peer_namespaces(/home/jenkins/jenkins-slave/workspace/HBase-Flaky-Tests/hbase-shell/src/main/ruby/hbase/replication_admin.rb:225)
> RUBY.command(/home/jenkins/jenkins-slave/workspace/HBase-Flaky-Tests/hbase-shell/src/main/ruby/shell/commands/append_peer_namespaces.rb:40)
> org.jruby.RubyClass.finvoke(org/jruby/RubyClass.java:522)
> {code}
> The cause was due to adding to UnmodifiableCollection
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