[HBASE-1303] Secondary index configuration prevents HBase from starting

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.19.1
• Fix Version/s: 0.19.2, 0.20.0
• Component/s: regionserver
• Assignee: Unassigned
• Reporter: Ken Weiner
• Created: 01/Apr/09 01:39
• Updated: 13/Sep/09 22:24
• Resolved: 02/Apr/09 07:33

Description

HBase does not start up when configured to use the IndexedRegionServer with the following properties in hbase-site.xml

 <property>
     <name>hbase.regionserver.class</name>
     <value>org.apache.hadoop.hbase.ipc.IndexedRegionInterface</value>
     <description>Indexing is enabled for this hbase server.  </description>
 </property>
 <property>
    <name>hbase.regionserver.impl</name>
    <value>org.apache.hadoop.hbase.regionserver.tableindexed.IndexedRegionServer</value>
    <description>Indexing is enabled for this hbase server.</description>
</property>

This results in the following exception in the log:

2009-03-31 12:33:35,993 INFO org.apache.hadoop.ipc.HBaseServer: IPC Server handler 8 on 45026, call getProtocolVersion(org.apache.hadoop.hbase.ipc.IndexedRegionInterface, 16) from 127.0.0.1:60854: error: java.io.IOException: Unknown protocol to name node: org.apache.hadoop.hbase.ipc.IndexedRegionInterface
java.io.IOException: Unknown protocol to name node: org.apache.hadoop.hbase.ipc.IndexedRegionInterface
    at org.apache.hadoop.hbase.regionserver.HRegionServer.getProtocolVersion(HRegionServer.java:2146)
    at org.apache.hadoop.hbase.regionserver.transactional.TransactionalRegionServer.getProtocolVersion(TransactionalRegionServer.java:92)
    at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:632)
    at org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:912)
2009-03-31 12:33:35,994 WARN org.apache.hadoop.hbase.master.BaseScanner: Scan ROOT region
java.io.IOException: java.io.IOException: Unknown protocol to name node: org.apache.hadoop.hbase.ipc.IndexedRegionInterface
    at org.apache.hadoop.hbase.regionserver.HRegionServer.getProtocolVersion(HRegionServer.java:2146)
    at org.apache.hadoop.hbase.regionserver.transactional.TransactionalRegionServer.getProtocolVersion(TransactionalRegionServer.java:92)
    at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:632)
    at org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:912)

There is also a mailing list post on this problem:
http://markmail.org/message/6pugle5uegiijjbc?q=Secondary+Indexes+problem

I think the solution is to implement public long getProtocolVersion(final String protocol, final long clientVersion) in org.apache.hadoop.hbase.regionserver.tableindexed.IndexedRegionServer as follows:

  @Override
  public long getProtocolVersion(final String protocol, final long clientVersion)
      throws IOException {
    if (protocol.equals(IndexedRegionInterface.class.getName())) {
      return HBaseRPCProtocolVersion.versionID;
    }
    return super.getProtocolVersion(protocol, clientVersion);
  }