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    copied!<p>First things first, <a href="https://stackoverflow.com/questions/2090033/why-jsf-calls-getters-multiple-times/2090062#2090062">stop doing your business logic in your getter</a>. You should simply be returning the property. Below is one approach you could use. Make sure you check the link.</p> <p>Modify your <code>getPvtLog()</code></p> <pre><code>public String getPvtLog() { return result; } </code></pre> <p>Then define a method that will be used for your <code>actionListener</code> in <code>&lt;p:commandButton&gt;</code>to update <code>result</code>. Example: </p> <pre><code>public void click() { try { File logFile = new File(instanceRoot + "\\config\\ProcessVerification.log"); InputStream fis = new FileInputStream(logFile); result = readStream(fis); } catch (IOException e) { log.severe(e.getMessage()); } return result; } </code></pre> <p>Change the method name as you see fit. This is just a quick example. </p> <p>Now remove <code>type="button"</code> and instead of <code>onclick</code> change it to <code>oncomplete</code>. <code>onclick</code> is executed before an ajax request, you want <code>&lt;p:dialog&gt;</code> to pop up after the ajax request. I believe this is your main issue by the way. Also add an <code>actionListener</code> in your <code>&lt;p:commandButton&gt;</code>. </p> <pre><code>&lt;p:commandButton id="showLog" actionListener="#{pvtRunner.click()}" value="Show Log" oncomplete="dlg.show()" update=":logDialogContnet"/&gt; </code></pre> <p><strong>Sample</strong></p> <pre><code>&lt;p:dialog id="logDialog" header="PVT Log" widgetVar="dlg" height="400" width="600" dynamic="true"&gt; &lt;h:outputText id="logDialogContnet" value="#{pvtRunner.pvtLog}" escape="false"/&gt; &lt;/p:dialog&gt; &lt;h:form&gt; &lt;p:panelGrid id="mainPanelGrid" columns="1" styleClass="panelGridBorder panelGridCenter"&gt; &lt;p:commandButton id="showLog" actionListener="#{pvtRunner.click()}" value="Show Log" oncomplete="dlg.show()" update=":logDialogContnet"/&gt; &lt;/p:panelGrid&gt; &lt;/h:form&gt; </code></pre>
 

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