Apache Hop Rest War Application

[malenkurion]

Hello community,

I'm trying to use the Apache Hop Rest Web Application (the WAR project) with a tomcat server.

I tested with a "custom" tomcat installation and the docker image builded with the script "create_hop_rest_container.sh" with Apache hop 2.9 but the first start with an error (org.glassfish.jersey.servlet.internal.Utils NoSuchMethodError) and the second seems not to start at all.

I think I've missed something but I dont know what.

Is there a step by step guide to build and install the hop-rest WAR app ?

King regards.

[bamaer]

Did you see the Hop Web Development Guide?

Feel free to post your follow-up here if the steps in that guide don't work for you. Can you also add your operating system, JRE distribution and version and as many other relevant details as possible in that case?

[malenkurion]

Hi,
thank you for the Guide. I totally missed it (shame on me).
I will try it today.

[malenkurion]

Hi,

Here are some details about my configuration

System: Win11 (using git bash as CLI)
Hop: Apache hop 2.9
TomCat: apache-tomcat-9.0.97
maven: Apache Maven 3.9.8
JDK: jdk-17.0.2

I use the Hop Web Development Guide and everything works fine for Apache HOP Web UI.

I unzip the hop-rest war app in the tomcat's webapps folder and restart tomcat (under hop-rest folder). I have the same error for very call of API with curl (here in french)

État HTTP 404 – Non trouvé
Type Rapport d'état

message La ressource demandée [/hop-rest/api/v1/metadata/list/pipeline-run-configuration/] n'est pas disponible

description La ressource demandée n'est pas disponible.

Apache Tomcat/9.0.97

I've done a test with Apache tomcat 10.1.33. The hop/ui doesn't start () but the hop-rest app responds with some errors:

/hop-rest/api/v1/plugins/list/org.apache.hop.pipeline.engine.PipelineEnginePluginType
=>
ava.lang.NoClassDefFoundError: Could not initialize class org.apache.hop.core.logging.LogChannel
	org.apache.hop.core.plugins.BasePluginType.<init>(BasePluginType.java:74)
	org.apache.hop.core.plugins.BasePluginType.<init>(BasePluginType.java:87)
	org.apache.hop.pipeline.transform.RowDistributionPluginType.<init>(RowDistributionPluginType.java:32)
	org.apache.hop.pipeline.transform.RowDistributionPluginType.getInstance(RowDistributionPluginType.java:37)
	org.apache.hop.core.HopEnvironment.getStandardPluginTypes(HopEnvironment.java:82)
	org.apache.hop.core.HopEnvironment.init(HopEnvironment.java:77)
	org.apache.hop.rest.Hop.<init>(Hop.java:79)
	org.apache.hop.rest.Hop.getInstance(Hop.java:69)
	org.apache.hop.rest.v1.HopApplication.<init>(HopApplication.java:28)
	java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77)
	java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499)
	java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:480)
	org.glassfish.hk2.utilities.reflection.ReflectionHelper.makeMe(ReflectionHelper.java:1356)
	org.jvnet.hk2.internal.Utilities.justCreate(Utilities.java:1060)
	org.jvnet.hk2.internal.ServiceLocatorImpl.create(ServiceLocatorImpl.java:984)
	org.jvnet.hk2.internal.ServiceLocatorImpl.createAndInitialize(ServiceLocatorImpl.java:1088)
	org.jvnet.hk2.internal.ServiceLocatorImpl.createAndInitialize(ServiceLocatorImpl.java:1080)
	org.glassfish.jersey.inject.hk2.AbstractHk2InjectionManager.createAndInitialize(AbstractHk2InjectionManager.java:199)
	org.glassfish.jersey.inject.hk2.ImmediateHk2InjectionManager.createAndInitialize(ImmediateHk2InjectionManager.java:30)
	org.glassfish.jersey.server.ApplicationConfigurator.createApplication(ApplicationConfigurator.java:114)
	org.glassfish.jersey.server.ApplicationConfigurator.init(ApplicationConfigurator.java:72)
	org.glassfish.jersey.server.ApplicationHandler.lambda$initialize$0(ApplicationHandler.java:307)
	java.base/java.util.Arrays$ArrayList.forEach(Arrays.java:4204)
	org.glassfish.jersey.server.ApplicationHandler.initialize(ApplicationHandler.java:307)
	org.glassfish.jersey.server.ApplicationHandler.<init>(ApplicationHandler.java:274)
	org.glassfish.jersey.servlet.WebComponent.<init>(WebComponent.java:311)
	org.glassfish.jersey.servlet.ServletContainer.init(ServletContainer.java:154)
	org.glassfish.jersey.servlet.ServletContainer.init(ServletContainer.java:338)
	jakarta.servlet.GenericServlet.init(GenericServlet.java:143)
	jakarta.servlet.http.HttpServlet.init(HttpServlet.java:121)
	org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:483)
	org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93)
	org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:663)
	org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:344)
	org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:397)
	org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)
	org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:905)
	org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1741)
	org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
	org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1190)
	org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
	org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:63)
	java.base/java.lang.Thread.run(Thread.java:833)

still investigating

[bamaer]

I incorrectly assumed this was about Hop Web. The hop-rest module hasn't been worked in well over a year and is not included in any of our integration tests. Maybe the best option is just to remove that module from the code.

[malenkurion]

My first post was missing some details about that.
Will you totally abandon the hop-rest application ?

[bamaer]

probably, but we'll come up with something better to replace it, hopefully in Q1 2025.