INTER: ARBLOCK errors [Timebox: 4.5 days]

[FreddieAkeroyd]

As a developer I would like to understnad why INTER is reporting errors from the block archiver

[2022-11-08 00:04:36] 2022-11-08 00:04:36.005 WARNING [Thread 3678] org.csstudio.archive.engine.server.Servlet (doGet) - HTTP Server exception
[2022-11-08 00:04:36] java.lang.ArrayIndexOutOfBoundsException: Index 175 out of bounds for length 75

[2022-11-08 00:04:36] 	at java.base/java.util.concurrent.CopyOnWriteArrayList.elementAt(CopyOnWriteArrayList.java:385)

[2022-11-08 00:04:36] 	at java.base/java.util.concurrent.CopyOnWriteArrayList.get(CopyOnWriteArrayList.java:398)

[2022-11-08 00:04:36] 	at org.csstudio.archive.engine.model.ArchiveGroup.getChannel(ArchiveGroup.java:97)

[2022-11-08 00:04:36] 	at org.csstudio.archive.engine.server.json.JSONGroupResponse.fillResponse(JSONGroupResponse.java:52)

[2022-11-08 00:04:36] 	at org.csstudio.archive.engine.server.Servlet.doGet(Servlet.java:60)

[2022-11-08 00:04:36] 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:687)

[2022-11-08 00:04:36] 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)

[2022-11-08 00:04:36] 	at org.eclipse.equinox.http.servlet.internal.HttpServiceRuntimeImpl$LegacyServlet.service(HttpServiceRuntimeImpl.java:1459)

[2022-11-08 00:04:36] 	at org.eclipse.equinox.http.servlet.internal.registration.EndpointRegistration.service(EndpointRegistration.java:159)

[2022-11-08 00:04:36] 	at org.eclipse.equinox.http.servlet.internal.servlet.ResponseStateHandler.processRequest(ResponseStateHandler.java:67)

[2022-11-08 00:04:36] 	at org.eclipse.equinox.http.servlet.internal.context.DispatchTargets.doDispatch(DispatchTargets.java:117)

[2022-11-08 00:04:36] 	at org.eclipse.equinox.http.servlet.internal.servlet.ProxyServlet.dispatch(ProxyServlet.java:147)

[2022-11-08 00:04:36] 	at org.eclipse.equinox.http.servlet.internal.servlet.ProxyServlet.preprocess(ProxyServlet.java:115)

[2022-11-08 00:04:36] 	at org.eclipse.equinox.http.servlet.internal.servlet.ProxyServlet.service(ProxyServlet.java:104)

[2022-11-08 00:04:36] 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)

[2022-11-08 00:04:36] 	at org.eclipse.equinox.http.jetty.internal.HttpServerManager$InternalHttpServiceServlet.service(HttpServerManager.java:305)

[2022-11-08 00:04:36] 	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:791)

[2022-11-08 00:04:36] 	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:550)

[2022-11-08 00:04:36] 	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)

[2022-11-08 00:04:36] 	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1624)

[2022-11-08 00:04:36] 	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)

[2022-11-08 00:04:36] 	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1435)

[2022-11-08 00:04:36] 	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188)

[2022-11-08 00:04:36] 	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:501)

[2022-11-08 00:04:36] 	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1594)

[2022-11-08 00:04:36] 	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186)

[2022-11-08 00:04:36] 	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1350)

[2022-11-08 00:04:36] 	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)

[2022-11-08 00:04:36] 	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)

[2022-11-08 00:04:36] 	at org.eclipse.jetty.server.Server.handle(Server.java:516)

[2022-11-08 00:04:36] 	at org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:388)

[2022-11-08 00:04:36] 	at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:633)

[2022-11-08 00:04:36] 	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:380)

[2022-11-08 00:04:36] 	at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:273)

[2022-11-08 00:04:36] 	at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:311)

[2022-11-08 00:04:36] 	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:105)

[2022-11-08 00:04:36] 	at org.eclipse.jetty.io.ChannelEndPoint$1.run(ChannelEndPoint.java:104)

[2022-11-08 00:04:36] 	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:336)

[2022-11-08 00:04:36] 	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:313)

[2022-11-08 00:04:36] 	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:171)

[2022-11-08 00:04:36] 	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:129)

[2022-11-08 00:04:36] 	at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:375)

[2022-11-08 00:04:36] 	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:773)

[2022-11-08 00:04:36] 	at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:905)

[2022-11-08 00:04:36] 	at java.base/java.lang.Thread.run(Thread.java:829)

Acceptance criteria

• Cause of error understood and fixed