Re: Java program waits 30 seconds in SELW status

>From the developer who works on the command/program call server ...

   SELW is a Select Wait - our daemon jobs go into that all the time while
   sitting on a select(), waiting for a connection.  If the customer
   program is using a select() in order to check sockets for something to
   read or write, that would explain the SELW.  Then the question becomes
   why is it waiting for 30 seconds when the same program doesn't wait on a
   different system.  Are they up to date on PTFs, particularly for the
   sockets components?  Does the program use select()?  If so, I would look
   at the code around that area.

David Wall
AS/400 Toolbox for Java




                      "Kendall
                      Coolidge"                To:       
<JAVA400-L@midrange.com>
                      <kendall.coolidge        cc:
                      @ccbai.com>              Subject:  Java program waits 30 
seconds in SELW status
                      Sent by:
                      java400-l-admin@m
                      idrange.com


                      02/12/2002 05:20
                      PM
                      Please respond to
                      java400-l





Hello All,

We have an AS/400 Java program that binds to a TCP port and waits for data
to come through.  When running on our AS/400, when the data is received,
the
program immediately executes the next lines of code, processes the data,
and
returns to wait on that port.  However, on a customer's AS/400, the program
goes into a SELW status after it receives the data and waits there (using
no
CPU) for 30 seconds before processing the data successfully.

Can anyone suggest why the two machines would act so differently?  Both are
V4R5, using Toolbox 4.5 Mod 0.3, and JDK 1.1.8.  Our older model 40S does
not exhibit this behavior while the customer's 270 does.

Thanks in advance for any suggestions!

Kendall Coolidge


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