https://community.dynatrace.com/t5/Troubleshooting/How-to-check-Synthetic-Monitor-Websocket-errors-in-logs/ta-p/211647 <H2>Summary</H2> <P><SPAN>If your Dynatrace Synthetic Browser Monitor fails due to </SPAN><STRONG style="font-family: inherit; font-size: 16px;">WebSocket connection issues</STRONG><SPAN>, the error is not always visible in the UI.</SPAN></P> <DIV> <DIV class="paragraph-in-scc-markdown-text ___1ngh792 ftgm304 f1iaxwol">This guide shows you how to:</DIV> <UL> <LI class="___ccc16d0 fje8fi8 f1ng9h0j f1bwykku f18jd3zf">Locate the correct <STRONG>ActiveGate logs</STRONG></LI> <LI class="___ccc16d0 fje8fi8 f1ng9h0j f1bwykku f18jd3zf">Identify <STRONG>WebSocket errors (e.g., status 1001)</STRONG></LI> <LI class="___ccc16d0 fje8fi8 f1ng9h0j f1bwykku f18jd3zf">Use the <STRONG>VisitId</STRONG> to trace failures across logs</LI> <LI class="___ccc16d0 fje8fi8 f1ng9h0j f1bwykku f18jd3zf">Pinpoint the exact step where the failure occurred</LI> </UL> <P>&nbsp;</P> </DIV> <P><LI-TOC indent="15" liststyle="disc" maxheadinglevel="3"></LI-TOC></P> <P class="lia-align-justify">&nbsp;</P> <DIV> <H3>Step 1 – Download Synthetic logs from ActiveGate</H3> <OL> <LI class="___ccc16d0 fje8fi8 f1ng9h0j f1bwykku f18jd3zf">Go to <STRONG>Deployment Status</STRONG><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="a_barbera_0-1683560261401.png" style="width: 999px;"><img src="https://community.dynatrace.com/t5/image/serverpage/image-id/11535iECE89630EE3C6B5C/image-size/large?v=v2&amp;px=999" role="button" title="a_barbera_0-1683560261401.png" alt="a_barbera_0-1683560261401.png" /></span></LI> <LI class="___ccc16d0 fje8fi8 f1ng9h0j f1bwykku f18jd3zf">Select <STRONG style="font-family: inherit; text-align: justify;">Run ActiveGate diagnostics.&nbsp;</STRONG>This may take some time.<span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="a_barbera_1-1683560323939.png" style="width: 999px;"><img src="https://community.dynatrace.com/t5/image/serverpage/image-id/11536iD333D8DD4C57442E/image-size/large?v=v2&amp;px=999" role="button" title="a_barbera_1-1683560323939.png" alt="a_barbera_1-1683560323939.png" /></span></LI> <LI class="___ccc16d0 fje8fi8 f1ng9h0j f1bwykku f18jd3zf">Download the generated <STRONG>Support Archive<BR /><span class="lia-unicode-emoji" title=":backhand_index_pointing_right:">👉</span> This archive contains Synthetic execution logs, including browser-level logs.<BR /></STRONG></LI> <LI class="___ccc16d0 fje8fi8 f1ng9h0j f1bwykku f18jd3zf">Extract the archive locally</LI> </OL> </DIV> <P class="lia-align-justify"><span class="lia-inline-image-display-wrapper lia-image-align-center" image-alt="a_barbera_2-1683560936171.png" style="width: 999px;"><img src="https://community.dynatrace.com/t5/image/serverpage/image-id/11537iDBAD97C4BB95C5AA/image-size/large?v=v2&amp;px=999" role="button" title="a_barbera_2-1683560936171.png" alt="a_barbera_2-1683560936171.png" /></span></P> <DIV> <H3>Step 2 – Locate the browser log file</H3> <DIV class="paragraph-in-scc-markdown-text ___1ngh792 ftgm304 f1iaxwol">Navigate to:</DIV> <PRE><CODE>COLLECTOR/0x____/synthetic/vuc-logs/ </CODE></PRE> <DIV class="paragraph-in-scc-markdown-text ___1ngh792 ftgm304 f1iaxwol">Open:</DIV> <PRE><CODE>vuc-browser.log </CODE></PRE> <DIV class="paragraph-in-scc-markdown-text ___1ngh792 ftgm304 f1iaxwol">This file contains <STRONG>browser execution details</STRONG>, including WebSocket activity</DIV> </DIV> <P class="lia-align-justify">&nbsp;</P> <P class="lia-align-justify"><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="a_barbera_4-1683561169720.png" style="width: 999px;"><img src="https://community.dynatrace.com/t5/image/serverpage/image-id/11539i62554B6D7511D104/image-size/large?v=v2&amp;px=999" role="button" title="a_barbera_4-1683561169720.png" alt="a_barbera_4-1683561169720.png" /></span></P> <DIV> <H3>Step 3 – Identify failed executions</H3> <DIV class="paragraph-in-scc-markdown-text ___1ngh792 ftgm304 f1iaxwol">Search for:</DIV> <PRE><CODE>TEST_ABORTED </CODE></PRE> <DIV class="paragraph-in-scc-markdown-text ___1ngh792 ftgm304 f1iaxwol">This indicates a failed execution.</DIV> <DIV class="paragraph-in-scc-markdown-text ___1ngh792 ftgm304 f1iaxwol">Example:</DIV> <PRE><CODE>WebSocket connection is closed (Status 1001) </CODE></PRE> <DIV class="paragraph-in-scc-markdown-text ___1ngh792 ftgm304 f1iaxwol"><span class="lia-unicode-emoji" title=":backhand_index_pointing_right:">👉</span> This confirms a WebSocket-related failure.</DIV> </DIV> <P class="lia-align-justify">&nbsp;</P> <P class="lia-align-justify"><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="a_barbera_0-1685100778094.png" style="width: 999px;"><img src="https://community.dynatrace.com/t5/image/serverpage/image-id/11893iA8F3757056B42712/image-size/large?v=v2&amp;px=999" role="button" title="a_barbera_0-1685100778094.png" alt="a_barbera_0-1685100778094.png" /></span></P> <DIV> <P>&nbsp;</P> <H3>Step 4 – Extract the VisitId</H3> <DIV class="paragraph-in-scc-markdown-text ___1ngh792 ftgm304 f1iaxwol">Within the same log entry, locate:</DIV> <PRE><CODE>VisitId = &lt;number&gt; </CODE></PRE> <DIV class="paragraph-in-scc-markdown-text ___1ngh792 ftgm304 f1iaxwol">Example:</DIV> <PRE><CODE>6680333610458108891 </CODE></PRE> <DIV class="paragraph-in-scc-markdown-text ___1ngh792 ftgm304 f1iaxwol">The <STRONG>VisitId</STRONG> allows you to correlate logs across components.</DIV> <DIV class="paragraph-in-scc-markdown-text ___1ngh792 ftgm304 f1iaxwol">&nbsp;</DIV> <DIV class="paragraph-in-scc-markdown-text ___1ngh792 ftgm304 f1iaxwol"> <DIV> <H3>Step 5 – Correlate with VUP logs</H3> <H4 class="paragraph-in-scc-markdown-text ___1ngh792 ftgm304 f1iaxwol">Recent executions</H4> <P class="paragraph-in-scc-markdown-text ___1ngh792 ftgm304 f1iaxwol">Navigate to:</P> <PRE><CODE>COLLECTOR/0x____/synthetic/vup-logs/ </CODE></PRE> <DIV class="paragraph-in-scc-markdown-text ___1ngh792 ftgm304 f1iaxwol">Search for files containing the same <STRONG>VisitId</STRONG>.</DIV> <DIV class="paragraph-in-scc-markdown-text ___1ngh792 ftgm304 f1iaxwol"><span class="lia-unicode-emoji" title=":backhand_index_pointing_right:">👉</span> Only recent executions, the last hour or 2, are available in this archive.&nbsp;<FONT size="3"><FONT color="#000000">Later on, we will see how it is possible to check older executions.</FONT></FONT></DIV> <DIV class="paragraph-in-scc-markdown-text ___1ngh792 ftgm304 f1iaxwol">&nbsp;</DIV> </DIV> </DIV> </DIV> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="a_barbera_0-1685102280024.png" style="width: 999px;"><img src="https://community.dynatrace.com/t5/image/serverpage/image-id/11900iFF213A88D0F2AE4B/image-size/large?v=v2&amp;px=999" role="button" title="a_barbera_0-1685102280024.png" alt="a_barbera_0-1685102280024.png" /></span></P> <P class="lia-align-justify"><STRONG><FONT color="#800080">T</FONT><FONT color="#800080"><STRONG>h</STRONG>e number of the VisitId is in the middle of the file names</FONT></STRONG>.&nbsp;</P> <P>&nbsp;</P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="a_barbera_3-1685102438106.png" style="width: 999px;"><img src="https://community.dynatrace.com/t5/image/serverpage/image-id/11903iEB03F44BD0155AC2/image-size/large?v=v2&amp;px=999" role="button" title="a_barbera_3-1685102438106.png" alt="a_barbera_3-1685102438106.png" /></span></P> <P class="lia-align-center">&nbsp;</P> <DIV> <DIV> <DIV class="paragraph-in-scc-markdown-text ___1ngh792 ftgm304 f1iaxwol">&nbsp;</DIV> <H4 class="paragraph-in-scc-markdown-text ___1ngh792 ftgm304 f1iaxwol">Older executions</H4> <DIV class="paragraph-in-scc-markdown-text ___1ngh792 ftgm304 f1iaxwol">Navigate to:</DIV> <PRE><CODE>COLLECTOR/0x____/synthetic/<FONT size="2">vup-archivedLogs</FONT>/</CODE></PRE> </DIV> <P class="lia-align-justify">In this folder, we will see other folders named Dates and Hours:<BR /><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="a_barbera_1-1684135589169.png" style="width: 811px;"><img src="https://community.dynatrace.com/t5/image/serverpage/image-id/33421iAD5ACE609CF39290/image-size/large?v=v2&amp;px=999" role="button" title="a_barbera_1-1684135589169.png" alt="a_barbera_1-1684135589169.png" /></span></P> <P>&nbsp;Open the file for the day and hour that the execution occurred.</P> <P>Search for files containing the same <STRONG>VisitId</STRONG>.</P> <P><span class="lia-unicode-emoji" title=":backhand_index_pointing_right:">👉</span> The time on the files uses the timezone the ActiveGate is using<FONT size="3"><FONT color="#000000">.</FONT></FONT></P> <P>&nbsp;</P> <H3>Step 6 – Identify the failing step</H3> <DIV class="paragraph-in-scc-markdown-text ___1ngh792 ftgm304 f1iaxwol">Inside the matching file, search for:</DIV> <UL> <LI class="___ccc16d0 fje8fi8 f1ng9h0j f1bwykku f18jd3zf"><CODE>Index</CODE></LI> <LI class="___ccc16d0 fje8fi8 f1ng9h0j f1bwykku f18jd3zf"><CODE>Step</CODE></LI> <LI class="___ccc16d0 fje8fi8 f1ng9h0j f1bwykku f18jd3zf"><CODE>Type</CODE></LI> </UL> <DIV class="paragraph-in-scc-markdown-text ___1ngh792 ftgm304 f1iaxwol">These help identify:</DIV> <UL> <LI class="___ccc16d0 fje8fi8 f1ng9h0j f1bwykku f18jd3zf">The last executed step</LI> <LI class="___ccc16d0 fje8fi8 f1ng9h0j f1bwykku f18jd3zf">Where the test stopped</LI> </UL> <DIV class="paragraph-in-scc-markdown-text ___1ngh792 ftgm304 f1iaxwol">Example:</DIV> <UL> <LI class="___ccc16d0 fje8fi8 f1ng9h0j f1bwykku f18jd3zf">Failure between <STRONG>Step 42 → Step 43</STRONG><BR />→ Indicates where to investigate or adjust the monitor.</LI> </UL> </DIV> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="a_barbera_4-1685102504572.png" style="width: 999px;"><img src="https://community.dynatrace.com/t5/image/serverpage/image-id/11904i07C378B6AA849B8F/image-size/large?v=v2&amp;px=999" role="button" title="a_barbera_4-1685102504572.png" alt="a_barbera_4-1685102504572.png" /></span></P> <P class="lia-align-left">&nbsp;</P> <H2>Resolution</H2> <DIV>In some cases, <STRONG>WebSocket-related failures are not caused by connectivity issues</STRONG>, but by how the Synthetic Browser Monitor handles timing between steps. Things you can try:</DIV> <UL> <LI>Adjust the wait condition for the event. You can find the options <A href="https://docs.dynatrace.com/docs/observe/digital-experience/synthetic-monitoring/browser-monitors/browser-clickpath-events#wait" target="_self">here</A>.&nbsp;</LI> <LI>For clicks, try using a java script event. See&nbsp;<A href="https://community.dynatrace.com/t5/Troubleshooting/How-to-perform-a-click-event-using-Javascript-on-browser/ta-p/244503" target="_blank">How to perform a click event using Javascript on browser clickpath synthetic monitors.</A></LI> </UL> <H2><BR />What's Next</H2> <DIV> <DIV> <DIV class="paragraph-in-scc-markdown-text ___1ngh792 ftgm304 f1iaxwol">If the issue persists after trying JavaScript and trusted events, open a<SPAN>&nbsp;</SPAN><STRONG>support chat or ticket</STRONG><SPAN>&nbsp;</SPAN>and provide:</DIV> <UL> <LI class="___ccc16d0 fje8fi8 f1ng9h0j f1bwykku f18jd3zf">A link to the affected monitor</LI> <LI class="___ccc16d0 fje8fi8 f1ng9h0j f1bwykku f18jd3zf">The selector and JavaScript used</LI> <LI class="___ccc16d0 fje8fi8 f1ng9h0j f1bwykku f18jd3zf">A reference to this article</LI> </UL> </DIV> <P>&nbsp;</P> <H3 id="toc-hId--633734674"><STRONG><SPAN data-contrast="auto">Related reading</SPAN></STRONG><SPAN data-ccp-props="{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335559738&quot;:299,&quot;335559739&quot;:299}">&nbsp;</SPAN></H3> <P><SPAN data-ccp-props="{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335559738&quot;:240,&quot;335559739&quot;:240}"><span class="lia-unicode-emoji" title=":open_book:">📖</span>&nbsp;&nbsp;<A id="link_6" class="page-link lia-link-navigation lia-custom-event" href="https://community.dynatrace.com/t5/Troubleshooting/Synthetic-Troubleshooting-Map/ta-p/250426" target="_blank">Synthetic Troubleshooting Map</A></SPAN></P> <P><SPAN data-ccp-props="{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335559738&quot;:240,&quot;335559739&quot;:240}"><span class="lia-unicode-emoji" title=":open_book:">📖</span>&nbsp;&nbsp;<A href="https://docs.dynatrace.com/docs/observe/digital-experience/synthetic-monitoring/browser-monitors/browser-clickpath-events#wait" target="_blank">Browser Monitor Wait options</A></SPAN></P> <P><SPAN data-ccp-props="{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335559738&quot;:240,&quot;335559739&quot;:240}"><span class="lia-unicode-emoji" title=":open_book:">📖</span>&nbsp;&nbsp;</SPAN><A id="link_7" class="page-link lia-link-navigation lia-custom-event" style="font-family: inherit; background-color: #ffffff;" href="https://community.dynatrace.com/t5/Troubleshooting/Useful-Synthetic-ActiveGate-logs/ta-p/214478" target="_blank">Useful Synthetic ActiveGate logs</A></P> <P><SPAN data-ccp-props="{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335559738&quot;:240,&quot;335559739&quot;:240}"><span class="lia-unicode-emoji" title=":open_book:">📖</span>&nbsp;&nbsp;<A id="link_6" class="page-link lia-link-navigation lia-custom-event" href="https://community.dynatrace.com/t5/Troubleshooting/Collect-a-Support-Archive-for-nbsp-Troubleshooting-issues-in/ta-p/252022" target="_self">Collect a Support Archive for Troubleshooting issues in Dynatrace</A>&nbsp;&nbsp;</SPAN></P> </DIV> Thu, 11 Jun 2026 16:43:44 GMT a_barbera 2026-06-11T16:43:44Z https://community.dynatrace.com/t5/Troubleshooting/How-to-check-Synthetic-Monitor-Websocket-errors-in-logs/ta-p/211647 <P>This article will explain how to check Websocket errors in Synthetic Monitor test logs. So we will be able to identify if there was any error during the test and in what step the error occurred.&nbsp;</P> Thu, 11 Jun 2026 16:43:44 GMT https://community.dynatrace.com/t5/Troubleshooting/How-to-check-Synthetic-Monitor-Websocket-errors-in-logs/ta-p/211647 a_barbera 2026-06-11T16:43:44Z https://community.dynatrace.com/t5/Troubleshooting/How-to-check-Synthetic-Monitor-Websocket-errors-in-logs/tac-p/213302#M234 <P>Great write up&nbsp;<a href="https://community.dynatrace.com/t5/user/viewprofilepage/user-id/55875">@a_barbera</a>&nbsp;</P> Fri, 26 May 2023 14:19:02 GMT https://community.dynatrace.com/t5/Troubleshooting/How-to-check-Synthetic-Monitor-Websocket-errors-in-logs/tac-p/213302#M234 ChadTurner 2023-05-26T14:19:02Z https://community.dynatrace.com/t5/Troubleshooting/How-to-check-Synthetic-Monitor-Websocket-errors-in-logs/tac-p/226155#M325 <P>This is really awesome..&nbsp;<a href="https://community.dynatrace.com/t5/user/viewprofilepage/user-id/55875">@a_barbera</a>&nbsp;</P> Sat, 21 Oct 2023 22:37:46 GMT https://community.dynatrace.com/t5/Troubleshooting/How-to-check-Synthetic-Monitor-Websocket-errors-in-logs/tac-p/226155#M325 sujit_k_singh 2023-10-21T22:37:46Z https://community.dynatrace.com/t5/Troubleshooting/How-to-check-Synthetic-Monitor-Websocket-errors-in-logs/tac-p/227669#M337 <P>Thank you very much for this advice! It came in handy!</P> Sat, 04 Nov 2023 17:27:10 GMT https://community.dynatrace.com/t5/Troubleshooting/How-to-check-Synthetic-Monitor-Websocket-errors-in-logs/tac-p/227669#M337 radek_jasinski 2023-11-04T17:27:10Z