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

[Keziake]

Hi,
I'm having the same issue.

Here is the message and stack:

HTTP ERROR 500 javax.servlet.ServletException: Error producing web service output

URI: | /hop/webService/ -- | -- 500 javax.servlet.ServletException: Error producing web service output org.apache.hop.www.WebServiceServlet-2ba9ed19 javax.servlet.ServletException: Error producing web service output org.apache.hop.core.exception.HopException: Error preparing remote pipeline Cannot invoke "org.apache.hop.core.logging.LogLevel.getLevel()" because "filterLogLevel" is null java.lang.NullPointerException: Cannot invoke "org.apache.hop.core.logging.LogLevel.getLevel()" because "filterLogLevel" is null

Caused by:

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$1.run(ChannelEndPoint.java:104)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:882)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1036)
	at java.base/java.lang.Thread.run(Thread.java:1589)
Caused by: org.apache.hop.core.exception.HopException: 
Error preparing remote pipeline
Cannot invoke "org.apache.hop.core.logging.LogLevel.getLevel()" because "filterLogLevel" is null
at org.apache.hop.pipeline.engines.remote.RemotePipelineEngine.prepareExecution(RemotePipelineEngine.java:259)
at org.apache.hop.www.WebServiceServlet.doGet(WebServiceServlet.java:195)
... 30 more

Caused by: java.lang.NullPointerException: Cannot invoke "org.apache.hop.core.logging.LogLevel.getLevel()" because "filterLogLevel" is null

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:230)

... 31 more


from hop.