Re: Repost of problem: tomcat hangs with sockets on CLOSE_WAIT when user cancels request

[Dave Smith <sa...@home.com>]

Ramakrishna,

> org.apache.jasper.runtime.JspServlet.unknownException(JspServlet.java:268)

Your JSP is crapping out. Are you catching this by using an error page?
Notice, the trace is kind enough to even tell you the line number of the
offending source code. Look in the work folder and examine the generated
jsp source code at line 268.

Or, use your favorite debugging strategy and refactor.

Regards,

Dave

----- Original Message -----
From: "RAMAKRISHNA SANKA" <rs...@usa.net>
To: <to...@jakarta.apache.org>
Sent: Tuesday, January 02, 2001 10:16 AM
Subject: Repost of problem: tomcat hangs with sockets on CLOSE_WAIT when
user cancels request


Hi All,
I am running Tomcat 3.1 in stand-alone mode on AIX 4.3.3 using
IBM JDK1.2. My servlets connect to an Oracle database and
forward to a jsp to display the results. Of late I have had
flaky behaviour from this operation.

Problem 1.
Every now and this request causes a SIGSEGV and core dump.
========= BEGIN excerpt from javacore... ==============
SIGSEGV received at 2 in . Processing terminated.
    "Thread-56" (TID:0x800323b0, sys_thread_t:0x308ec430, state:R, native
ID:0xc41) prio=5
        at java.io.BufferedWriter.<init>(BufferedWriter.java:96)
        at java.io.BufferedWriter.<init>(BufferedWriter.java:79)
        at java.io.PrintWriter.<init>(PrintWriter.java:112)
        at
org.apache.jasper.runtime.JspServlet.unknownException(JspServlet.java:268)
        at org.apache.jasper.runtime.JspServlet.service(JspServlet.java:377)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
        at
org.apache.tomcat.core.ServletWrapper.handleRequest(ServletWrapper.java(Comp
iled
Cod
e))
        at
org.apache.tomcat.core.ContextManager.service(ContextManager.java:559)
        at
org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpC
onnectio
nHandler.java:160)
        at
org.apache.tomcat.service.TcpConnectionThread.run(SimpleTcpEndpoint.java:338
)
        at java.lang.Thread.run(Thread.java:481)

         ----- Native Stack -----
        unavailable - iar 2 not in text area
-------------------------------------------------------------------------
J2RE 1.2.2 IBM build ca122-19991217

========= End excerpt from javacore ... ===========

Problem 2.
This request takes too long. I click the stop button on the
Netscape browser and it just sits there waiting. I check on
the server and 'netstat -a | grep <port>' reveals a connection
in LISTEN status and another in CLOSE_WAIT status. However,
from this point on no other connection from any client works.
(It takes inordinately long. I waited ten minutes with no
result other than CPU going to 100% on the client side.)
I have to re-start the server before I can do anything else.

This is really bugging me. Please help.

RK


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