https://community.dynatrace.com/t5/Troubleshooting/Troubleshooting-Logs-Not-Arriving-from-ActiveGate-Extensions-Log/ta-p/298979 <H2 id="heading-overview">Overview<A class="ws-nowrap" href="https://dynatrace.stackenterprise.co/articles/23664#heading-overview" target="_blank" rel="noopener">​</A></H2> <P>This article describes a scenario where log ingestion is silently rejected by the Extension Execution Controller (EEC) on an ActiveGate host due to the log persistence storage being full. Logs will not appear in Dynatrace even though the monitored sources appear healthy.</P> <HR /> <H2 class="text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold">When can this problem be observed?</H2> <P class="font-claude-response-body break-words whitespace-normal leading-[1.7]">This problem typically surfaces in the following situations:</P> <UL class="[li_&amp;]:mb-0 [li_&amp;]:mt-1 [li_&amp;]:gap-1 [&amp;:not(:last-child)_ul]:pb-1 [&amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3"> <LI class="font-claude-response-body whitespace-normal break-words pl-2"><STRONG>High log ingest volume</STRONG>&nbsp;- a large number of extensions or monitored sources are sending logs through a single ActiveGate, causing persistence to fill faster than it can be flushed to the cluster.</LI> <LI class="font-claude-response-body whitespace-normal break-words pl-2"><STRONG>Prolonged connectivity issues</STRONG>&nbsp;- if the ActiveGate cannot reach the Dynatrace cluster for an extended period, buffered log data accumulates in persistence until it reaches the configured limit.</LI> <LI class="font-claude-response-body whitespace-normal break-words pl-2"><STRONG>After onboarding new log sources</STRONG> - adding new extensions or increasing log verbosity on existing ones can push an otherwise healthy ActiveGate over the persistence threshold.</LI> </UL> <H2 id="heading-symptoms">Symptoms<A class="ws-nowrap" href="https://dynatrace.stackenterprise.co/articles/23664#heading-symptoms" target="_blank" rel="noopener">​</A></H2> <P>The following indicators point to this issue:</P> <P><STRONG>Metrics</STRONG></P> <UL> <LI><CODE>dsfm:extension.engine.logs_ingest.records_rejected</CODE><SPAN>&nbsp;</SPAN>shows a non-zero and/or increasing count of rejected log records.</LI> <LI><CODE>dsfm:extension.engine.eec_status</CODE><SPAN>&nbsp;</SPAN>split by<SPAN>&nbsp;</SPAN><CODE>dt.extension.status</CODE><SPAN>&nbsp;</SPAN>shows the value<SPAN>&nbsp;</SPAN><CODE>LOG_PERSISTENCE_FULL</CODE>.</LI> </UL> <P><STRONG>Datasource logs</STRONG></P> <P>The following message may appear in the extension or datasource logs on the ActiveGate host:</P> <PRE><CODE>Log persistence full, rejecting logs </CODE></PRE> <HR /> <H2 id="heading-root-cause">Root Cause<A class="ws-nowrap" href="https://dynatrace.stackenterprise.co/articles/23664#heading-root-cause" target="_blank" rel="noopener">​</A></H2> <P>The EEC uses a local disk-based persistence mechanism (the<SPAN>&nbsp;</SPAN><EM>reliability mechanism</EM>) to buffer log data. This ensures that logs collected from monitored sources are not lost in the event of:</P> <UL> <LI>Temporary network issues between the ActiveGate and the Dynatrace cluster</LI> <LI>ActiveGate or OneAgent restarts</LI> <LI>Transient data ingest overloads</LI> </UL> <P>When the persistence reaches its storage limit, the EEC can no longer accept new log records and begins rejecting them. This results in log data gaps in Dynatrace.</P> <P>The persistence is located at:</P> <DIV class="s-table-container"> <TABLE class="s-table"> <THEAD> <TR> <TH>OS</TH> <TH>Path</TH> </TR> </THEAD> <TBODY> <TR> <TD><STRONG>Windows</STRONG></TD> <TD><CODE>%PROGRAMDATA%\dynatrace\remotepluginmodule\agent\runtime\extensions\persistence</CODE></TD> </TR> <TR> <TD><STRONG>Linux</STRONG></TD> <TD><CODE>/var/lib/dynatrace/remotepluginmodule/agent/runtime/extensions/persistence</CODE></TD> </TR> </TBODY> </TABLE> </DIV> <P>By default, this directory is capped at<SPAN>&nbsp;</SPAN><STRONG>600 MB</STRONG>. The full reliability mechanism also requires an additional buffer of<SPAN>&nbsp;</SPAN><STRONG>1.5GB</STRONG>, meaning a minimum of<SPAN>&nbsp;</SPAN><STRONG>2100 MB of total free disk space</STRONG><SPAN>&nbsp;</SPAN>is required on the host at default settings.</P> <HR /> <H2 id="heading-resolution">Resolution<A class="ws-nowrap" href="https://dynatrace.stackenterprise.co/articles/23664#heading-resolution" target="_blank" rel="noopener">​</A></H2> <P>There are two approaches to resolving this issue. Choose the one that best fits your environment.</P> <H3 id="heading-option-1-increase-the-persistence-size-limit-recommended">Option 1: Increase the persistence size limit (Recommended)<A class="ws-nowrap" href="https://dynatrace.stackenterprise.co/articles/23664#heading-option-1-increase-the-persistence-size-limit-recommended" target="_blank" rel="noopener">​</A></H3> <P>If the host has sufficient free disk space, increase the maximum persistence volume by editing the EEC configuration file.</P> <P><STRONG>Configuration file location:</STRONG></P> <DIV class="s-table-container"> <TABLE class="s-table"> <THEAD> <TR> <TH>OS</TH> <TH>Path</TH> </TR> </THEAD> <TBODY> <TR> <TD><STRONG>Windows</STRONG></TD> <TD><CODE>C:\ProgramData\dynatrace\remotepluginmodule\agent\conf\extensionsuser.conf</CODE></TD> </TR> <TR> <TD><STRONG>Linux</STRONG></TD> <TD><CODE>/var/lib/dynatrace/remotepluginmodule/agent/conf/extensionsuser.conf</CODE></TD> </TR> </TBODY> </TABLE> </DIV> <P>Add or update the following property (value is in kilobytes):</P> <PRE class="lang-ini s-code-block"><CODE class="hljs language-ini" data-highlighted="yes"><SPAN class="hljs-attr">persistence.total_limit_kb</SPAN> = <SPAN class="hljs-number">614400</SPAN> </CODE></PRE> <P>The default value is<SPAN>&nbsp;</SPAN><CODE>614400</CODE><SPAN>&nbsp;</SPAN>(600 MB). Increase it to a value your disk can support. Remember to account for the required buffer of<SPAN>&nbsp;</SPAN><STRONG>1.5GB</STRONG><SPAN>&nbsp;</SPAN>on top of whatever limit you set.</P> <P>After editing the file, restart the ActiveGate service for the change to take effect.</P> <BLOCKQUOTE> <P><STRONG>Note:</STRONG><SPAN>&nbsp;</SPAN>Before increasing the limit, verify that the host has enough free disk space. The minimum requirement is<SPAN>&nbsp;</SPAN><CODE>persistence.total_limit_kb</CODE><SPAN>&nbsp;</SPAN>+<SPAN>&nbsp;</SPAN><STRONG>1.5GB</STRONG><SPAN>&nbsp;</SPAN>of total free space.</P> </BLOCKQUOTE> <HR /> <H3 id="heading-option-2-disable-reliable-mode-use-with-caution">Option 2: Disable reliable mode (Use with caution)<A class="ws-nowrap" href="https://dynatrace.stackenterprise.co/articles/23664#heading-option-2-disable-reliable-mode-use-with-caution" target="_blank" rel="noopener">​</A></H3> <P>If disk space cannot be increased on the host, you can disable the reliability mechanism entirely. In this mode, log data is transmitted directly without being persisted locally, meaning logs<SPAN>&nbsp;</SPAN><STRONG>will be lost</STRONG><SPAN>&nbsp;</SPAN>if there is a communication failure between the ActiveGate and the cluster.</P> <P>In the same<SPAN>&nbsp;</SPAN><CODE>extensionsuser.conf</CODE><SPAN>&nbsp;</SPAN>file, set:</P> <PRE class="lang-ini s-code-block"><CODE class="hljs language-ini" data-highlighted="yes"><SPAN class="hljs-attr">persistence.reliable_mode</SPAN> = <SPAN class="hljs-literal">false</SPAN> </CODE></PRE> <BLOCKQUOTE> <P><span class="lia-unicode-emoji" title=":warning:">⚠️</span><SPAN>&nbsp;</SPAN><STRONG>Warning:</STRONG><SPAN>&nbsp;</SPAN>Setting<SPAN>&nbsp;</SPAN><CODE>persistence.reliable_mode = false</CODE><SPAN>&nbsp;</SPAN>means that logs will<SPAN>&nbsp;</SPAN><STRONG>not</STRONG><SPAN>&nbsp;</SPAN>be stored locally during ActiveGate restarts, network disruptions, or ingest overloads. This can result in permanent log data loss. Use this setting only as a temporary workaround or in environments where occasional log gaps are acceptable.</P> </BLOCKQUOTE> <P>Restart the ActiveGate service after making this change.</P> <HR /> <H2 id="heading-verification">Verification<A class="ws-nowrap" href="https://dynatrace.stackenterprise.co/articles/23664#heading-verification" target="_blank" rel="noopener">​</A></H2> <P>After applying the fix, confirm the issue is resolved by checking:</P> <OL> <LI>The metric<SPAN>&nbsp;</SPAN><CODE>dsfm:extension.engine.logs_ingest.records_rejected</CODE><SPAN>&nbsp;</SPAN>should drop to zero or stop increasing.</LI> <LI>The<SPAN>&nbsp;</SPAN><CODE>dsfm:extension.engine.eec_status</CODE><SPAN>&nbsp;</SPAN>dimension<SPAN>&nbsp;</SPAN><CODE>dt.extension.status</CODE><SPAN>&nbsp;</SPAN>should no longer show<SPAN>&nbsp;</SPAN><CODE>LOG_PERSISTENCE_FULL</CODE>.</LI> <LI>Log ingestion should resume and new log records should appear in Dynatrace Log Viewer.</LI> </OL> <H2>What's next</H2> <P>If this article didn't help, please open a support ticket, mention that this article was used, and provide the following:</P> <UL> <LI>Link to the tenant</LI> <LI><SPAN data-contrast="none">A description of the problem</SPAN><SPAN data-ccp-props="{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;201341983&quot;:0,&quot;335551550&quot;:1,&quot;335551620&quot;:1,&quot;335559685&quot;:450,&quot;335559737&quot;:0,&quot;335559738&quot;:0,&quot;335559739&quot;:0,&quot;335559740&quot;:279,&quot;335559991&quot;:360}">&nbsp;</SPAN></LI> </UL> <UL> <LI data-aria-level="1" data-aria-posinset="2" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}" data-listid="23" data-font="Symbol" data-leveltext="" aria-setsize="-1"><SPAN data-contrast="none">A list of troubleshooting steps that have been performed</SPAN><SPAN data-ccp-props="{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;201341983&quot;:0,&quot;335551550&quot;:1,&quot;335551620&quot;:1,&quot;335559685&quot;:450,&quot;335559737&quot;:0,&quot;335559738&quot;:0,&quot;335559739&quot;:0,&quot;335559740&quot;:279,&quot;335559991&quot;:360}">&nbsp;</SPAN></LI> </UL> <UL> <LI data-aria-level="1" data-aria-posinset="3" data-list-defn-props="{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}" data-listid="23" data-font="Symbol" data-leveltext="" aria-setsize="-1"><SPAN data-contrast="none">Logs from the ActiveGate or OneAgent - support_archive.zip (</SPAN><A href="https://community.dynatrace.com/t5/Troubleshooting/How-to-collect-a-Support-Archive/ta-p/252022" target="_blank" rel="noopener"><SPAN data-contrast="none">How to collect a Support Archive</SPAN></A><SPAN data-contrast="none">)</SPAN><SPAN data-ccp-props="{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;201341983&quot;:0,&quot;335551550&quot;:1,&quot;335551620&quot;:1,&quot;335559685&quot;:450,&quot;335559737&quot;:0,&quot;335559738&quot;:0,&quot;335559739&quot;:0,&quot;335559740&quot;:279,&quot;335559991&quot;:360}">&nbsp;</SPAN></LI> </UL> Tue, 02 Jun 2026 11:42:34 GMT Czapran_Patryk 2026-06-02T11:42:34Z https://community.dynatrace.com/t5/Troubleshooting/Troubleshooting-Logs-Not-Arriving-from-ActiveGate-Extensions-Log/ta-p/298979 <P><LI-TOC indent="15" liststyle="disc" maxheadinglevel="2"></LI-TOC></P> <DIV class="lia-message-template-content-zone"> <P>*<EM>Use a table of contents for longer articles.&nbsp;</EM></P> <H1>Summary</H1> <P><EM>*This is a mandatory section.</EM></P> <P><EM>Short description of which part of the Dynatrace platform the article refers to and what kind of problem it will help resolve / task it will describe.</EM></P> <P>&nbsp;</P> <H1>Problem</H1> <P><EM>*This is a mandatory section.</EM></P> <P><EM>Provide a precise description of the problem / task to be described.</EM></P> <P>&nbsp;</P> <H1>Troubleshooting steps</H1> <P><EM>*This section can be omitted.</EM></P> <P>&nbsp;</P> <H1>Resolution</H1> <P><EM>*This section can be omitted for ticket‑creation articles.</EM></P> <H1>What's next</H1> <P><EM>*This is a mandatory section.</EM></P> </DIV> Tue, 02 Jun 2026 11:42:34 GMT https://community.dynatrace.com/t5/Troubleshooting/Troubleshooting-Logs-Not-Arriving-from-ActiveGate-Extensions-Log/ta-p/298979 Czapran_Patryk 2026-06-02T11:42:34Z https://community.dynatrace.com/t5/Troubleshooting/Troubleshooting-Logs-Not-Arriving-from-ActiveGate-Extensions-Log/tac-p/300168#M1123 <P>Thank you!&nbsp;<img class="lia-deferred-image lia-image-emoji" src="https://community.dynatrace.com/html/@9BD876A77FEF3D5EF4BC972CF8A97CB1/images/emoticons/take_my_money.png" alt=":take_my_money:" title=":take_my_money:" /></P> Tue, 02 Jun 2026 06:54:05 GMT https://community.dynatrace.com/t5/Troubleshooting/Troubleshooting-Logs-Not-Arriving-from-ActiveGate-Extensions-Log/tac-p/300168#M1123 AntonPineiro 2026-06-02T06:54:05Z