# \[BUG-12976\] OPC UA Server Crashing **URL:** \ **Category:** Ignition Early Access\ **Created:** [March 5, 2019, 5:54pm UTC](https://forum.inductiveautomation.com/t/bug-12976-opc-ua-server-crashing/23073 "2019-03-05T17:54:19Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![roger\_larson](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/roger_larson/32/8574_2.png) [@roger\_larson](https://forum.inductiveautomation.com/u/roger_larson)\ **Post date:** [March 5, 2019, 5:54pm UTC](https://forum.inductiveautomation.com/t/bug-12976-opc-ua-server-crashing/23073/1 "2019-03-05T17:54:19Z")
Hi all, I ran into an issue where my tags stopped receiving data, effectively making all of the data stale. I tried restarting the OPA UA module, and it resulted in this error. It also popped up on the modules page, but it strangely still shows the module as “running”. My next step is to restart the service and see if that brings the tags back, but i’m not sure why this crashed. Ideas? ```auto java.lang.IllegalStateException: Cannot call startup when state=STOPPED at com.inductiveautomation.ignition.common.lifecycle.AbstractLifecycle.startup(AbstractLifecycle.java:20) at com.inductiveautomation.ignition.gateway.project.IgnitionProjectManager.restartScripting(IgnitionProjectManager.java:125) at com.inductiveautomation.ignition.gateway.modules.ModuleManagerImpl.executeModuleOperation(ModuleManagerImpl.java:899) at com.inductiveautomation.ignition.gateway.modules.ModuleManagerImpl.restartModuleInternal(ModuleManagerImpl.java:797) at com.inductiveautomation.ignition.gateway.modules.ModuleManagerImpl.restartModule(ModuleManagerImpl.java:789) at com.inductiveautomation.ignition.gateway.web.pages.config.ModulePage$RestartAction.execute(ModulePage.java:563) at com.inductiveautomation.ignition.gateway.web.components.ConfirmationPanel$1.onClick(ConfirmationPanel.java:50) at org.apache.wicket.markup.html.link.Link.onLinkClicked(Link.java:189) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.base/java.lang.reflect.Method.invoke(Unknown Source) at org.apache.wicket.RequestListenerInterface.internalInvoke(RequestListenerInterface.java:258) at org.apache.wicket.RequestListenerInterface.invoke(RequestListenerInterface.java:216) at org.apache.wicket.core.request.handler.ListenerInterfaceRequestHandler.invokeListener(ListenerInterfaceRequestHandler.java:240) at org.apache.wicket.core.request.handler.ListenerInterfaceRequestHandler.respond(ListenerInterfaceRequestHandler.java:226) at org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:814) at org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64) at org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:253) at org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:210) at org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:281) at org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:188) at org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:245) at com.inductiveautomation.ignition.gateway.bootstrap.GatewayFilter.doFilter(GatewayFilter.java:74) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1629) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:533) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143) at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132) at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:190) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1595) at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:188) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1253) at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:168) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:473) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1564) at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:166) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1155) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132) at org.eclipse.jetty.rewrite.handler.RewriteHandler.handle(RewriteHandler.java:335) at org.eclipse.jetty.server.handler.HandlerList.handle(HandlerList.java:61) at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:126) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132) at org.eclipse.jetty.server.Server.handle(Server.java:530) at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:347) at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:256) at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:279) at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:102) at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:124) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:247) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.produce(EatWhatYouKill.java:140) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:131) at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:382) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:708) at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:626) at java.base/java.lang.Thread.run(Unknown Source) ``` Thread dump attached here. [thread\_dump.zip](https://us1.discourse-cdn.com/inductiveautomation/original/2X/7/7ff16b81d4ff4a4c72bff67fe8776749e8661212.zip) (9.0 KB) Wrapper log here.[wrapper.zip](https://us1.discourse-cdn.com/inductiveautomation/original/2X/0/0e4013d551c54e41afcd8abc3c7f7408a7ed2eab.zip) (162.5 KB) For reference, we have the usual Ignition OPA-UA Server connection, and a Kepware EX Server 6 connection as well. Both of those seem to be fine though, so not sure where this is coming from. Cheers, Roger ---
**Author:** ![paul-griffith](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/paul-griffith/32/37249_2.png) [@paul-griffith](https://forum.inductiveautomation.com/u/paul-griffith)\ **Post date:** [March 5, 2019, 6:11pm UTC](https://forum.inductiveautomation.com/t/bug-12976-opc-ua-server-crashing/23073/2 "2019-03-05T18:11:28Z")
A post was merged into an existing topic: [[Bug-12976]Build 8.0.0-beta0 (b2019030402):Error uninstalling, installing or restarting custom module](https://forum.inductiveautomation.com/t/bug-12976-build-8-0-0-beta0-b2019030402-error-uninstalling-installing-or-restarting-custom-module/23046) ---
**Author:** ![paul-griffith](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/paul-griffith/32/37249_2.png) [@paul-griffith](https://forum.inductiveautomation.com/u/paul-griffith)\ **Post date:** [March 5, 2019, 6:11pm UTC](https://forum.inductiveautomation.com/t/bug-12976-opc-ua-server-crashing/23073/3 "2019-03-05T18:11:28Z")