[Bug]: Null pointer exception while executing a Webservice pipeline

[kevin-dmello]

Apache Hop version?

2.7.0 (2023-12-01 10.59.05)

Java version?

11

Operating system

Linux

What happened?

Was testing out the web service capability of the Hop server and ran into a null pointer exception while executing the webservice pipeline. Had an incorrect setting on the Pipeline run configuration for the web service - had it remote instead of local, changing this fixed the issue, but logging this since we should ideally not have a NPE thrown. Here's the exception:

javax.servlet.ServletException: Error producing web service output at org.apache.hop.www.WebServiceServlet.doGet(WebServiceServlet.java:231) at javax.servlet.http.HttpServlet.service(HttpServlet.java:687) at org.apache.hop.www.BaseHttpServlet.service(BaseHttpServlet.java:103) at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:799) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:550) at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1624) at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1435) at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:501) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1594) at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1350) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141) at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:234) at org.eclipse.jetty.server.handler.HandlerList.handle(HandlerList.java:59) at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:567) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127) at org.eclipse.jetty.server.Server.handle(Server.java:516) at org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:388) at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:633) at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:380) at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:277) at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:311) at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:105) at org.eclipse.jetty.io.ChannelEndPoint$1.run(ChannelEndPoint.java:104) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:336) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:313) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:171) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.produce(EatWhatYouKill.java:135) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:882) at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1036) at java.base/java.lang.Thread.run(Thread.java:829) Caused by: org.apache.hop.core.exception.HopException: Error preparing remote pipeline at java.lang.Thread.run (Thread.java:829) at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run (QueuedThreadPool.java:1036) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob (QueuedThreadPool.java:882) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.produce (EatWhatYouKill.java:135) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce (EatWhatYouKill.java:171) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce (EatWhatYouKill.java:313) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask (EatWhatYouKill.java:336) at org.eclipse.jetty.io.ChannelEndPoint$1.run (ChannelEndPoint.java:104) at org.eclipse.jetty.io.FillInterest.fillable (FillInterest.java:105) at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded (AbstractConnection.java:311) at org.eclipse.jetty.server.HttpConnection.onFillable (HttpConnection.java:277) at org.eclipse.jetty.server.HttpChannel.handle (HttpChannel.java:380) at org.eclipse.jetty.server.HttpChannel.dispatch (HttpChannel.java:633) at org.eclipse.jetty.server.HttpChannel.lambda$handle$1 (HttpChannel.java:388) at org.eclipse.jetty.server.Server.handle (Server.java:516) at org.eclipse.jetty.server.handler.HandlerWrapper.handle (HandlerWrapper.java:127) at org.eclipse.jetty.security.SecurityHandler.handle (SecurityHandler.java:567) at org.eclipse.jetty.server.handler.HandlerList.handle (HandlerList.java:59) at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle (ContextHandlerCollection.java:234) at org.eclipse.jetty.server.handler.ScopedHandler.handle (ScopedHandler.java:141) at org.eclipse.jetty.server.handler.ContextHandler.doScope (ContextHandler.java:1350) at org.eclipse.jetty.server.handler.ScopedHandler.nextScope (ScopedHandler.java:186) at org.eclipse.jetty.server.session.SessionHandler.doScope (SessionHandler.java:1594) at org.eclipse.jetty.servlet.ServletHandler.doScope (ServletHandler.java:501) at org.eclipse.jetty.server.handler.ScopedHandler.nextScope (ScopedHandler.java:188) at org.eclipse.jetty.server.handler.ContextHandler.doHandle (ContextHandler.java:1435) at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle (ScopedHandler.java:233) at org.eclipse.jetty.server.session.SessionHandler.doHandle (SessionHandler.java:1624) at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle (ScopedHandler.java:233) at org.eclipse.jetty.servlet.ServletHandler.doHandle (ServletHandler.java:550) at org.eclipse.jetty.servlet.ServletHolder.handle (ServletHolder.java:799) at javax.servlet.http.HttpServlet.service (HttpServlet.java:790) at org.apache.hop.www.BaseHttpServlet.service (BaseHttpServlet.java:103) at javax.servlet.http.HttpServlet.service (HttpServlet.java:687) at org.apache.hop.www.WebServiceServlet.doGet (WebServiceServlet.java:195) at org.apache.hop.pipeline.engines.remote.RemotePipelineEngine.prepareExecution (RemotePipelineEngine.java:229) at org.apache.hop.core.logging.LogChannel.logBasic (LogChannel.java:157) at org.apache.hop.core.logging.LogChannel.println (LogChannel.java:105) at org.apache.hop.core.logging.LogLevel.isVisible (LogLevel.java:103) at org.apache.hop.pipeline.engines.remote.RemotePipelineEngine.prepareExecution(RemotePipelineEngine.java:258) at org.apache.hop.www.WebServiceServlet.doGet(WebServiceServlet.java:195) ... 34 more Caused by: java.lang.NullPointerException at org.apache.hop.core.logging.LogLevel.isVisible(LogLevel.java:103) at org.apache.hop.core.logging.LogChannel.println(LogChannel.java:105) at org.apache.hop.core.logging.LogChannel.logBasic(LogChannel.java:157) at org.apache.hop.pipeline.engines.remote.RemotePipelineEngine.prepareExecution(RemotePipelineEngine.java:229) ... 35 more

Issue Priority

Priority: 3

Issue Component

Component: Hop Server