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Re: Maximum Database connection issue in JBoss 5.1
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created by <a href="https://community.jboss.org/people/amathewjboss1">Anil Mathew</a> in <i>Datasource Configuration</i> - <a href="https://community.jboss.org/message/733101#733101">View the full discussion</a>
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<div class="jive-rendered-content"><p>Thank You so much for the response.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>The main problem is what you mentioned above. i.e when this issue happens we DO NOT have 4*275 concurrent request (clients). This is why i really can't figure out how we are reaching this maximum "in use connection count".</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>We don't have a <blocking-timeout-millis> entry in the ds file, which means it is using the default (i.e 30 seconds).</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><div class="mcePaste" id="_mcePaste" style="position: absolute; top: 0px; left: 0px;"></div><p>We did 2 of the above which you mentioned as a workaround. i.e added more jboss instances, limited the number of web sessions. These changes did in fact improved our situation but we still reach the "maximum in use connection count".</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><span style="font-family: &quot;Tahoma&quot;,&quot;sans-serif&quot;; color: #17365d; font-size: 10pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;"><p class="MsoNormal" style="margin: 0in 0in 0pt;"><span style="font-family: &quot;Tahoma&quot;,&quot;sans-serif&quot;; color: black; font-size: 10pt;"><span>Also i wanted to share this link with you - - </span><a class="jive-link-external-small" href="https://issues.jboss.org/browse/JBAS-4047" target="_blank">https://issues.jboss.org/browse/JBAS-4047</a><span>. I got this as a reply for my posting. </span></span></p></span></p><p class="MsoNormal" style="margin: 0in 0in 0pt;"><span style="font-family: &quot;Tahoma&quot;,&quot;sans-serif&quot;; color: black; font-size: 10pt;"> </span><span style="font-family: &quot;Tahoma&quot;,&quot;sans-serif&quot;; color: black; font-size: 10pt;"> </span></p><p class="MsoNormal" style="margin: 0in 0in 0pt;"><span style="font-family: &quot;Tahoma&quot;,&quot;sans-serif&quot;; color: black; font-size: 10pt;">Like it is mentioned in the above Jboss URL:</span></p><p class="MsoNormal" style="margin: 0in 0in 0pt;"><span style="font-family: &quot;Tahoma&quot;,&quot;sans-serif&quot;; color: black; font-size: 10pt;"> </span></p><p class="MsoNormal" style="margin: 0in 0in 0pt;"><span style="font-family: &quot;Tahoma&quot;,&quot;sans-serif&quot;; color: black; font-size: 10pt;">“The PooledInvokerProxy lock is held while getting an available connection from the pool and while the connection is tested. If the connection is to a local (machine) process, it may not take long for the server ACK to arrive. If the connection is to a remote (machine) process, it could take longer depending on network latency (especially if a wan is between tiers). “ </span></p><p><p class="MsoNormal" style="margin: 0in 0in 0pt;"><span style="font-family: &quot;Tahoma&quot;,&quot;sans-serif&quot;; color: black; font-size: 10pt;"> </span></p></p><p class="MsoNormal" style="margin: 0in 0in 0pt;"><span style="font-family: &quot;Tahoma&quot;,&quot;sans-serif&quot;; color: black; font-size: 10pt;">My thought is that when the ACK server call (since we are using PooledInvoker) isslow, many threads will wait for a connection.</span></p><p class="MsoNormal" style="margin: 0in 0in 0pt;"><span style="mso-fareast-language: EN-US; mso-bidi-language: AR-SA; : ; color: black; font-size: 10pt; mso-ansi-language: EN-US; sans-serif&quot: ; Tahoma&quot: ; mso-fareast-theme-font: minor-latin; font-family: &quot; mso-fareast-font-family: Calibri; ,&quot: ;"></span></p><p class="MsoNormal" style="margin: 0in 0in 0pt;"><span style="font-family: &quot;Tahoma&quot;,&quot;sans-serif&quot;; color: #17365d; font-size: 10pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;"></span><span style="color: #000000;">Again thanks for your time.</span></p><p class="MsoNormal" style="margin: 0in 0in 0pt;"><span style=": ; mso-fareast-language: EN-US; mso-bidi-language: AR-SA; color: #000000; font-size: 10pt; Tahoma&quot: ; sans-serif&quot: ; mso-ansi-language: EN-US; font-family: &quot; mso-fareast-theme-font: minor-latin; ,&quot: ; mso-fareast-font-family: Calibri;"></span></p><p class="MsoNormal" style="margin: 0in 0in 0pt;"><span style="font-family: &quot;Tahoma&quot;,&quot;sans-serif&quot;; color: #17365d; font-size: 10pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;"></span><span style="color: #000000;">Anil Mathew</span></p><p><p class="MsoNormal" style="margin: 0in 0in 0pt;"></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p></p><p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p></p></div>
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