[HBASE-7352] clone operation from HBaseAdmin can hang forever.

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.95.0
• Component/s: Client, master, regionserver, snapshots, Zookeeper
• Hadoop Flags: Reviewed
• Assignee: Matteo Bertozzi
• Reporter: Jonathan Hsieh
• Created: 14/Dec/12 00:26
• Updated: 23/Sep/13 18:30
• Resolved: 29/Dec/12 19:06

Description

Sometimes the clone operation from the hbase shell can hang. The table has been created (it shows up in the web ui), but does not have any entries in META.

There don't seem to be any clone, snapshot, enable or disable found in the master's jstack.

Here's a trace from the HBaseAdmin:

"main" prio=10 tid=0x00007f782800d000 nid=0x25c waiting on condition [0x00007f782f9bf000]
   java.lang.Thread.State: TIMED_WAITING (sleeping)
        at java.lang.Thread.sleep(Native Method)
        at org.apache.hadoop.hbase.client.HBaseAdmin.cloneSnapshot(HBaseAdmin.java:2413)
        at org.apache.hadoop.hbase.client.HBaseAdmin.cloneSnapshot(HBaseAdmin.java:2393)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.jruby.javasupport.JavaMethod.invokeDirectWithExceptionHandling(JavaMethod.java:465)
        at org.jruby.javasupport.JavaMethod.invokeDirect(JavaMethod.java:323)
        at org.jruby.java.invokers.InstanceMethodInvoker.call(InstanceMethodInvoker.java:69)
        at org.jruby.runtime.callsite.CachingCallSite.call(CachingCallSite.java:201)
        at org.jruby.ast.CallTwoArgNode.interpret(CallTwoArgNode.java:59)
        at org.jruby.ast.NewlineNode.interpret(NewlineNode.java:104)
... (more jruby stack) ...