[
https://issues.apache.org/jira/browse/HBASE-5007?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
honghua zhu updated HBASE-5007:
-------------------------------
Status: Patch Available (was: Open)
> HBaseAdmin.stopRegionServer do not stop the region server
> ---------------------------------------------------------
>
> Key: HBASE-5007
> URL: https://issues.apache.org/jira/browse/HBASE-5007
> Project: HBase
> Issue Type: Bug
> Components: ipc
> Affects Versions: 0.92.0
> Environment: all
> Reporter: honghua zhu
> Fix For: 0.92.0
>
> Attachments: HBase_0.92_HBASE-5007.patch
>
>
> Please running this example:
> public class Test {
> public static void main(String[] args) throws Exception {
> HBaseAdmin admin = new HBaseAdmin(HBaseConfiguration.create());
> admin.stopRegionServer("your.rs.hostname:60020");
> }
> }
> then, you can see:
> Exception in thread "main" java.lang.RuntimeException: The interface
> org.apache.hadoop.hbase.Stoppable
> at org.apache.hadoop.hbase.ipc.Invocation.<init>(Invocation.java:61)
> at
> org.apache.hadoop.hbase.ipc.WritableRpcEngine$Invoker.invoke(WritableRpcEngine.java:151)
> at $Proxy2.stop(Unknown Source)
> at
> org.apache.hadoop.hbase.client.HBaseAdmin.stopRegionServer(HBaseAdmin.java:1492)
> at Test.main(Test.java:7)
> Caused by: java.lang.NoSuchFieldException: VERSION
> at java.lang.Class.getField(Class.java:1520)
> at org.apache.hadoop.hbase.ipc.Invocation.<init>(Invocation.java:57)
> ... 4 more
> When invoking the "HBaseAdmin.stopRegionServer" method，
> we obtain a "proxy" for org.apache.hadoop.hbase.ipc.HRegionInterface，
> (HRegionInterface extends org.apache.hadoop.hbase.Stoppable)
> but the "stop" method declared in Stoppable.
> In the constructor of "org.apache.hadoop.hbase.ipc.Invocation"，
> the "method" argument is "public abstract void
> org.apache.hadoop.hbase.Stoppable.stop(java.lang.String)"，
> so, "method.getDeclaringClass()" is "org.apache.hadoop.hbase.Stoppable"，
> but, the "Stoppable" interface no "VERSION" field.
> [fix suggestion]:
> Override the "stop" method in org.apache.hadoop.hbase.ipc.HRegionInterface as
> follows:
> ==================================
> @Override
> public void stop(String why);
> of courese, another attempt is ok.
> (e.g. declare "VERSION" field in Stoppable interface，
> then modify some code fragment of Invocation and
> org.apache.hadoop.hbase.ipc.WritableRpcEngine.Server)
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