[HADOOP-7017] ipc.Client.Connection.receiveResponse throws ClassNotFoundException when large requests are sent to RPC.Server

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 0.20.2
• Component/s: ipc

Environment

JDK1.6/WindowsXP/CygWin/Tomcat6

• Assignee: Unassigned
• Reporter: tom liu
• Created: 03/Nov/10 06:37
• Updated: 10/Dec/10 05:02

Description

i use solr with katta integration, pls see https://issues.apache.org/jira/browse/SOLR-1395
when i use:

ab -n 100 -c 10 http://localhost:8080/solr/select?q=solr&...

i found solr throws NPE, so, i added some code like below:

ipc.Client.Connection

public void receiveResponse() {
      ...
      try {
           ...
           ...
      } catch (IOException e) {
        markClosed(e);
      } catch (RunTimeException t) {
          LOG.error("Unexpected error reading responses on connection ", t);
          throw t;
      }
    }

then, i catch the ClassNotFoundException:

java.lang.RuntimeException: readObject can't find class om-SL510?(responseê`?$name...
	at org.apache.hadoop.io.ObjectWritable.readObject(ObjectWritable.java:185)
	at org.apache.hadoop.io.ObjectWritable.readFields(ObjectWritable.java:66)
	at org.apache.hadoop.ipc.Client$Connection.receiveResponse(Client.java:511)
Caused by: java.lang.ClassNotFoundException: om-SL510?(responseê`?$name...
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:247)
	at org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:762)
	at org.apache.hadoop.io.ObjectWritable.readObject(ObjectWritable.java:183)