https://community.dynatrace.com/t5/Troubleshooting/OneAgent-won-t-function-with-Java-24-JEP-483-Ahead-of-Time-Class/ta-p/270685 <H1><SPAN>Summary</SPAN></H1> <P><SPAN>The Dynatrace OneAgent is incompatible with Java processes that have Ahead-of-Time (AOT) class loading enabled. This incompatibility may cause your application to crash or to disregard the AOT cache.</SPAN></P> <P>&nbsp;</P> <H1 id="toc-hId--705370114">Problem</H1> <P>The Java 24 feature "Ahead-of-Time Class Loading &amp; Linking" is inherently not designed to work with JVMTI agents, such as OneAgent. Therefore, OneAgent won't function with a Java process that has Ahead-of-Time class loading enabled; your application might crash or disregard the Ahead-of-Time cache. The error message to expect in this case is <SPAN><EM>java.lang.ClassNotFoundException</EM>.</SPAN></P> <P>&nbsp;</P> <H1 id="toc-hId--1514716740">Resolution</H1> <P>To enable OneAgent monitoring for Java processes, remove parameters related to Ahead-of-Time Class loading.<BR /><BR /></P> <P><STRONG>Source</STRONG></P> <UL> <LI><A href="https://openjdk.org/jeps/483" target="_self">JEP 483: Ahead-of-Time Class Loading &amp; Linking</A></LI> </UL> <P><EM>&nbsp;</EM></P> <H1 id="toc-hId-228093595">What's next</H1> <P>If this article did not help, please open a support ticket, mention that this article was used and provide the following in the ticket:</P> <DIV class="p-client_container"> <DIV class="p-ia4_client_container"> <DIV class="p-ia4_client p-ia4_client--with-search-in-top-nav p-ia4_client--workspace-switcher-rail-visibletest p-ia4_client--sidebar-wide p-ia4_client--narrow-feature-on"> <DIV class="p-client_workspace_wrapper" role="tabpanel" aria-label="Dynatrace"> <DIV class="p-client_workspace" role="tabpanel" aria-label="DMs"> <DIV class="p-client_workspace__layout"> <DIV class="active-managed-focus-container" role="none"> <DIV class="p-view_contents p-view_contents--primary" tabindex="-1" role="dialog" aria-label="Conversation with Anton Konikov"> <DIV class="tabbed_channel__Abx5r"> <DIV class="tabbed_channel__Abx5r"> <DIV class="channel_tab_panel__zJ5Bt c-tabs__tab_panel c-tabs__tab_panel--active c-tabs__tab_panel--full_height" role="none" data-qa="tabs_content_container"> <DIV class="p-file_drag_drop__container"> <DIV class="p-workspace__primary_view_body"> <DIV class="p-message_pane p-message_pane--classic-nav p-message_pane--scrollbar-float-adjustment p-message_pane--with-bookmarks-bar" data-qa="message_pane"> <DIV role="presentation"> <DIV class="c-virtual_list c-virtual_list--scrollbar c-message_list c-message_list--floating c-message_list--dark c-scrollbar c-scrollbar--fade" role="presentation"> <DIV class="c-scrollbar__hider" role="presentation" data-qa="slack_kit_scrollbar"> <DIV class="c-scrollbar__child" role="presentation"> <DIV class="c-virtual_list__scroll_container" tabindex="-1" role="list" data-qa="slack_kit_list" aria-label="Anton Konikov (direct message, active)"> <DIV id="1734101723.604509" class="c-virtual_list__item" tabindex="0" role="listitem" aria-setsize="-1" data-qa="virtual-list-item" data-item-key="1734101723.604509"> <DIV class="c-message_kit__background p-message_pane_message__message c-message_kit__message p-message_pane_message__message--last" role="presentation" data-qa="message_container" data-qa-unprocessed="false" data-qa-placeholder="false"> <DIV class="c-message_kit__hover" role="document" aria-roledescription="message" data-qa-hover="true"> <DIV class="c-message_kit__actions c-message_kit__actions--above"> <DIV class="c-message_kit__gutter"> <DIV class="c-message_kit__gutter__right" role="presentation" data-qa="message_content"> <DIV class="c-message_kit__blocks c-message_kit__blocks--rich_text"> <DIV class="c-message__message_blocks c-message__message_blocks--rich_text" data-qa="message-text"> <DIV class="p-block_kit_renderer" data-qa="block-kit-renderer"> <DIV class="p-block_kit_renderer__block_wrapper p-block_kit_renderer__block_wrapper--first"> <DIV class="p-rich_text_block" dir="auto"> <UL class="p-rich_text_list p-rich_text_list__bullet p-rich_text_list--nested" data-stringify-type="unordered-list" data-list-tree="true" data-indent="0" data-border="1" data-border-radius-top-cap="0"> <LI data-stringify-indent="0" data-stringify-border="1">description of the error you are seeing</LI> <LI data-stringify-indent="0" data-stringify-border="1">link to the host and process</LI> </UL> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> Mon, 07 Apr 2025 16:00:00 GMT moritzwitti 2025-04-07T16:00:00Z https://community.dynatrace.com/t5/Troubleshooting/OneAgent-won-t-function-with-Java-24-JEP-483-Ahead-of-Time-Class/ta-p/270685 <H1><SPAN>Summary</SPAN></H1> <P><SPAN>The Dynatrace OneAgent is incompatible with Java processes that have Ahead-of-Time (AOT) class loading enabled. This incompatibility may cause your application to crash or to disregard the AOT cache.</SPAN></P> <P>&nbsp;</P> <H1 id="toc-hId--705370114">Problem</H1> <P>The Java 24 feature "Ahead-of-Time Class Loading &amp; Linking" is inherently not designed to work with JVMTI agents, such as OneAgent. Therefore, OneAgent won't function with a Java process that has Ahead-of-Time class loading enabled; your application might crash or disregard the Ahead-of-Time cache. The error message to expect in this case is <SPAN><EM>java.lang.ClassNotFoundException</EM>.</SPAN></P> <P>&nbsp;</P> <H1 id="toc-hId--1514716740">Resolution</H1> <P>To enable OneAgent monitoring for Java processes, remove parameters related to Ahead-of-Time Class loading.<BR /><BR /></P> <P><STRONG>Source</STRONG></P> <UL> <LI><A href="https://openjdk.org/jeps/483" target="_self">JEP 483: Ahead-of-Time Class Loading &amp; Linking</A></LI> </UL> <P><EM>&nbsp;</EM></P> <H1 id="toc-hId-228093595">What's next</H1> <P>If this article did not help, please open a support ticket, mention that this article was used and provide the following in the ticket:</P> <DIV class="p-client_container"> <DIV class="p-ia4_client_container"> <DIV class="p-ia4_client p-ia4_client--with-search-in-top-nav p-ia4_client--workspace-switcher-rail-visibletest p-ia4_client--sidebar-wide p-ia4_client--narrow-feature-on"> <DIV class="p-client_workspace_wrapper" role="tabpanel" aria-label="Dynatrace"> <DIV class="p-client_workspace" role="tabpanel" aria-label="DMs"> <DIV class="p-client_workspace__layout"> <DIV class="active-managed-focus-container" role="none"> <DIV class="p-view_contents p-view_contents--primary" tabindex="-1" role="dialog" aria-label="Conversation with Anton Konikov"> <DIV class="tabbed_channel__Abx5r"> <DIV class="tabbed_channel__Abx5r"> <DIV class="channel_tab_panel__zJ5Bt c-tabs__tab_panel c-tabs__tab_panel--active c-tabs__tab_panel--full_height" role="none" data-qa="tabs_content_container"> <DIV class="p-file_drag_drop__container"> <DIV class="p-workspace__primary_view_body"> <DIV class="p-message_pane p-message_pane--classic-nav p-message_pane--scrollbar-float-adjustment p-message_pane--with-bookmarks-bar" data-qa="message_pane"> <DIV role="presentation"> <DIV class="c-virtual_list c-virtual_list--scrollbar c-message_list c-message_list--floating c-message_list--dark c-scrollbar c-scrollbar--fade" role="presentation"> <DIV class="c-scrollbar__hider" role="presentation" data-qa="slack_kit_scrollbar"> <DIV class="c-scrollbar__child" role="presentation"> <DIV class="c-virtual_list__scroll_container" tabindex="-1" role="list" data-qa="slack_kit_list" aria-label="Anton Konikov (direct message, active)"> <DIV id="1734101723.604509" class="c-virtual_list__item" tabindex="0" role="listitem" aria-setsize="-1" data-qa="virtual-list-item" data-item-key="1734101723.604509"> <DIV class="c-message_kit__background p-message_pane_message__message c-message_kit__message p-message_pane_message__message--last" role="presentation" data-qa="message_container" data-qa-unprocessed="false" data-qa-placeholder="false"> <DIV class="c-message_kit__hover" role="document" aria-roledescription="message" data-qa-hover="true"> <DIV class="c-message_kit__actions c-message_kit__actions--above"> <DIV class="c-message_kit__gutter"> <DIV class="c-message_kit__gutter__right" role="presentation" data-qa="message_content"> <DIV class="c-message_kit__blocks c-message_kit__blocks--rich_text"> <DIV class="c-message__message_blocks c-message__message_blocks--rich_text" data-qa="message-text"> <DIV class="p-block_kit_renderer" data-qa="block-kit-renderer"> <DIV class="p-block_kit_renderer__block_wrapper p-block_kit_renderer__block_wrapper--first"> <DIV class="p-rich_text_block" dir="auto"> <UL class="p-rich_text_list p-rich_text_list__bullet p-rich_text_list--nested" data-stringify-type="unordered-list" data-list-tree="true" data-indent="0" data-border="1" data-border-radius-top-cap="0"> <LI data-stringify-indent="0" data-stringify-border="1">description of the error you are seeing</LI> <LI data-stringify-indent="0" data-stringify-border="1">link to the host and process</LI> </UL> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> </DIV> Mon, 07 Apr 2025 16:00:00 GMT https://community.dynatrace.com/t5/Troubleshooting/OneAgent-won-t-function-with-Java-24-JEP-483-Ahead-of-Time-Class/ta-p/270685 moritzwitti 2025-04-07T16:00:00Z