Re: Java program waits 30 seconds in SELW status

The GetHostName API may be doing a DNS query to find your host name. Use
CFGTCP to define a local host name and domain. Then add this to the host
table. Lastly, make sure the seach order is for *LOCAL first. You might find
this helps.

Patrick

----- Original Message -----
From: "Kendall Coolidge" <kendall.coolidge@ccbai.com>
To: <java400-l@midrange.com>
Sent: Thursday, February 14, 2002 11:33 AM
Subject: RE: Java program waits 30 seconds in SELW status


> Thanks for your reply, David.  We have done some further investigation and
> have found the following:  The customer AS/400 is actually more up to date
> with PTF's than we are.  Is there a specific licensed program that I can
> check for PTF level?
>
> The job that hangs at SELW is the QJVACMDSRV job.  The first time data is
> sent to the port, the program begins to execute immediately, processes the
> data, and returns to wait on the port.  The second and subsequent times
data
> is sent to the port we see the 30 second SELW status.  We examined the
call
> stack of  QJVACMDSRV while it was in SELW and found the following
procedure
> name at the end of the stack:
> Java-net-InetAddress-getHostName()Ljava-lang-String;
>
> Does this give you any clues?
>
> Best regards,
> Kendall Coolidge
>
> -----Original Message-----
> From: java400-l-admin@midrange.com [mailto:java400-l-admin@midrange.com]
On
> Behalf Of Dave Wall
> Sent: Wednesday, February 13, 2002 5:17 PM
> To: java400-l@midrange.com
> Subject: 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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> _______________________________________________
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