[Json-rpc-java] SocketTimeout Exception when using apache

[Hunt, Stephen]

I'm using JSON in a multi tier deployment with apache doing virtual host and
reverse proxying, forwarding requests from specific customers to their own
instance of tomcat.

If a customer connects directly to their instance of tomcat then everything
works fine, however intermittently when connecting through the apache
forwarding though we see this exception and the browser hangs until
eventually returning a javascript error.

 

2006-12-04 14:03:57,856 WARN
[org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/mxvl].[com.
metaparadigm.jsonrpc.JSONRPCServlet]] Servlet.service() for servlet
com.metaparadigm.jsonrpc.JSONRPCServlet threw exception

java.net.SocketTimeoutException: Read timed out

            at java.net.SocketInputStream.socketRead0(Native Method)

            at
java.net.SocketInputStream.read(SocketInputStream.java(Compiled Code))

            at
org.apache.coyote.http11.InternalInputBuffer.fill(InternalInputBuffer.java(C
ompiled Code))

            at
org.apache.coyote.http11.InternalInputBuffer$InputStreamInputBuffer.doRead(I
nternalInputBuffer.java(Compiled Code))

            at
org.apache.coyote.http11.filters.IdentityInputFilter.doRead(IdentityInputFil
ter.java(Compiled Code))

            at
org.apache.coyote.http11.InternalInputBuffer.doRead(InternalInputBuffer.java
(Compiled Code))

            at org.apache.coyote.Request.doRead(Request.java(Inlined
Compiled Code))

            at
org.apache.catalina.connector.InputBuffer.realReadBytes(InputBuffer.java(Inl
ined Compiled Code))

            at
org.apache.tomcat.util.buf.ByteChunk.substract(ByteChunk.java(Compiled
Code))

            at
org.apache.catalina.connector.InputBuffer.read(InputBuffer.java(Inlined
Compiled Code))

            at
org.apache.catalina.connector.CoyoteInputStream.read(CoyoteInputStream.java(
Compiled Code))

            at
sun.nio.cs.StreamDecoder$ConverterSD.implRead(StreamDecoder.java(Compiled
Code))

            at sun.nio.cs.StreamDecoder.read(StreamDecoder.java(Compiled
Code))

            at
java.io.InputStreamReader.read(InputStreamReader.java(Compiled Code))

            at java.io.BufferedReader.fill(BufferedReader.java(Compiled
Code))

            at java.io.BufferedReader.read1(BufferedReader.java(Compiled
Code))

            at java.io.BufferedReader.read(BufferedReader.java(Compiled
Code))

            at
com.metaparadigm.jsonrpc.JSONRPCServlet.service(JSONRPCServlet.java(Compiled
Code))

            at
javax.servlet.http.HttpServlet.service(HttpServlet.java(Compiled Code))

            at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application
FilterChain.java(Compiled Code))

            at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh
ain.java(Compiled Code))

            at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.ja
va(Compiled Code))

            at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.ja
va(Compiled Code))

            at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase
.java(Compiled Code))

            at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java(Com
piled Code))

            at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java(Com
piled Code))

            at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java
(Compiled Code))

            at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java(Compi
led Code))

            at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java(Compil
ed Code))

            at
org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processC
onnection(Http11BaseProtocol.java(Compiled Code))

            at
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.jav
a(Compiled Code))

            at
org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWo
rkerThread.java(Compiled Code))

            at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.jav
a(Compiled Code))

            at java.lang.Thread.run(Thread.java:570)

 

Obviously this is some sort of timeout, but I'm at a loss trying to explain
why it's occurring or coming up with a solution that doesn't involve
bypassing apache (not an option unfortunately).

 

Can anyone give any suggestions, even suggestions of where to look would be
helpful at this point.

 

Thanks in advance.

Steve

 

Steve Hunt
Software Developer
Northgate HR
Direct/Tel: +44(0)1246 439478

Fax: +44(0)1246 439401

Email: Stephen.Hunt at northgate-is.com <mailto:Stephen.Hunt at northgate-is.com> 
Web: www.northgate-is.com/hrs <http://www.northgate-is.com/hrs> 

 

 


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