97 lines
6.5 KiB
HTML
97 lines
6.5 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<meta name="DC.Type" content="reference" />
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<meta name="DC.Title" content="Service jobs for TCP/IP servers" />
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<meta name="abstract" content="The DDM TCP/IP server does not use transaction program names (TPNs) as the Advanced Program-to-Program Communication (APPC) server does. However, the use of prestart jobs by the TCP/IP server provides a way to start a service job in that environment." />
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<meta name="description" content="The DDM TCP/IP server does not use transaction program names (TPNs) as the Advanced Program-to-Program Communication (APPC) server does. However, the use of prestart jobs by the TCP/IP server provides a way to start a service job in that environment." />
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<meta name="DC.subject" content="TCP/IP, service jobs" />
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<meta name="keywords" content="TCP/IP, service jobs" />
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<meta name="DC.Relation" scheme="URI" content="rbal1stsrvjb.htm" />
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<meta name="DC.Relation" scheme="URI" content="rbal1qrwoptions.htm" />
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<meta name="DC.Relation" scheme="URI" content="../cl/strsrvjob.htm" />
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<meta name="DC.Relation" scheme="URI" content="../cl/chgpje.htm" />
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Service jobs for TCP/IP servers</title>
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</head>
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<body id="rbal1starttcp"><a name="rbal1starttcp"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Service jobs for TCP/IP servers</h1>
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<div><p>The DDM TCP/IP server does not use transaction program names (TPNs)
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as the Advanced Program-to-Program Communication (APPC) server
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does. However, the use of prestart jobs by the TCP/IP server provides a way
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to start a service job in that environment.</p>
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<div class="section"><p>Note, however, that with the introduction of the function associated
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with the QRWOPTIONS data area usage, you might not need to start a service
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job in many cases. That feature allows one to start traces and do other diagnostic
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functions. You might still need to start a service job if you need a trace
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of the connection phase of the job. </p>
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</div>
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<div class="section"><p>You can use the <span class="cmdname">Display Log (DSPLOG)</span> command
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to find the CPI3E34 message reporting the name of the server job being used
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for a given connection if the following statements are true:</p>
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</div>
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<div class="section"> <ul><li>You do not need to trace the actions of the server during the connect
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operation</li>
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<li>You choose not to use the QRWOPTIONS function</li>
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<li>You have the ability to delay execution of the application requester (AR)
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job until you can do some setup on the server, such as from Interactive SQL</li>
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</ul>
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</div>
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<div class="section"><p>You can then use the <span class="cmdname">Start Service Job (STRSRVJOB)</span> command.</p>
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</div>
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<div class="section"><p>If you do need to trace the connect statement, or do not have
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time to do manual setup on the server after the connection, you will need
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to anticipate what prestart job will be used for the connection before it
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happens. One way to do that is to prevent other users from connecting during
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the time of your test, if possible, and end all of the prestart jobs except
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one.</p>
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</div>
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<div class="section"><p>You can force the number of prestart jobs to be 1 by setting the
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following parameters on the <span class="cmdname">Change Prestart Job Entry (CHGPJE)</span> command
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for QRWTSRVR running in QSYSWRK to the values specified here: </p>
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<ul><li>Initial number of jobs: <strong>1</strong></li>
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<li>Threshold: <strong>1</strong></li>
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<li>Additional number of jobs: <strong>0</strong></li>
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<li>Maximum number of jobs: <strong>1</strong></li>
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</ul>
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</div>
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<div class="section"><p>If you use this technique, be sure to change the parameters back
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to values that are reasonable for your environment; otherwise, users will
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get the message that <samp class="codeph">'A connection with a remote socket was reset
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by that socket'</samp> when trying to connect when the one prestart job
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is busy.</p>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rbal1stsrvjb.htm" title="When an application uses Distributed Relational Database Architecture (DRDA), the SQL statements are run in the application server job. Because of this, you might need to start debug or a job trace for the application server job that is running on the i5/OS operating system. The technique for doing this differs based on the use of either Advanced Program-to-Program Communication (APPC) or TCP/IP.">Start a service job to diagnose application server problems</a></div>
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</div>
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<div class="relconcepts"><strong>Related concepts</strong><br />
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<div><a href="rbal1qrwoptions.htm" title="When DDM or DRDA TCP/IP server jobs are initiated, they look for a data area in which the user can specify diagnostic and other options. The name is QRWOPTIONS, and it must reside in the QGPL library to take effect. It consists of a string of 48 characters.">QRWOPTIONS data area</a></div>
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</div>
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<div class="relinfo"><strong>Related information</strong><br />
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<div><a href="../cl/strsrvjob.htm">Start Service Job (STRSRVJOB) command</a></div>
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<div><a href="../cl/chgpje.htm">Change Prestart Job Entry (CHGPJE) command</a></div>
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<div><a href="../cl/dsplog.htm">Display Log (DSPLOG) command</a></div>
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</div>
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</div>
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</body>
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</html>
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