Help! On a production system that's been rock-solid for 18 months, Tomcat is
suddenly hanging on a daily basis!

Before the server hangs, we're logging runtime exceptions from
SocketInputStream.readHeader: the log records ArrayIndexOutOfBounds
exceptions every second for a few hours, then the server responds to every
subsequent request with a 400 "Bad Header" response, ie. hangs.

The same/similar problem was reported a year ago, see
http://www.mail-archive.com/tomcat-user@(protected)

Can anyone shed light on what is happening? Or suggest a workaround/fix?

Thanks,

Chris

Sample stack trace:
--------------------

2004-02-04 22:20:06 HttpProcessor[8080][14] process.parse
java.lang.ArrayIndexOutOfBoundsException
  at
org.apache.catalina.connector.http.SocketInputStream.readHeader(SocketInputS
tream.java:487)
  at
org.apache.catalina.connector.http.HttpProcessor.parseHeaders(HttpProcessor.
java:579)
  at
org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:
977)
  at
org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1125
)
  at java.lang.Thread.run (Thread.java:491)


-------------------------------
SocketInputStream.java line 487:
-------------------------------
while (!eol) {
// if the buffer is full, extend it
if (readCount >= maxRead) {
  if ((2 * maxRead) <= HttpHeader.MAX_VALUE_SIZE) {
   char[] newBuffer = new char[2 * maxRead];
   System.arraycopy(header.value, 0, newBuffer, 0,
         maxRead);
   header.value = newBuffer;
   maxRead = header.value.length;
  } else {
   throw new IOException
    (sm.getString("requestStream.readline.toolong"));
  }
}
// We're at the end of the internal buffer
if (pos >= count) {
  // Copying part (or all) of the internal buffer to the line
  // buffer
  int val = read();
  if (val == -1)
   throw new IOException
    (sm.getString("requestStream.readline.error"));
  pos = 0;
  readStart = 0;
}
if (buf[pos] == CR) {
} else if (buf[pos] == LF) {
  eol = true;
} else {
  // FIXME : Check if binary conversion is working fine
  int ch = buf[pos] & 0xff;
  header.value[readCount] = (char) ch; // <--- LINE 487
  readCount++;
}
pos++;
}


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