Greetings,
I am working on notebook for specific database and I decided to use Apache Zeppelin as a base, so I started with creating the most basic interpreter for it. I used this piece of documentation: https://zeppelin.apache.org/docs/latest/development/writing_zeppelin_interpreter.html . Thus, I created my class which inherits org.apache.zeppelin.interpreter.Interpreter class: import org.apache.zeppelin.interpreter.Interpreter; import org.apache.zeppelin.interpreter.InterpreterContext; import org.apache.zeppelin.interpreter.InterpreterException; import org.apache.zeppelin.interpreter.InterpreterResult; import org.apache.zeppelin.interpreter.InterpreterResult.Code; import org.apache.zeppelin.interpreter.InterpreterResult.Type; import java.util.Properties; public class GeoInterpreter extends Interpreter { public GeoInterpreter(Properties properties) { super(properties); } public void open() throws InterpreterException { } public void close() throws InterpreterException { } public InterpreterResult interpret(String s, InterpreterContext interpreterContext) throwsInterpreterException { return new InterpreterResult(Code.SUCCESS, Type.TEXT, s); } public void cancel(InterpreterContext interpreterContext) throws InterpreterException { } public FormType getFormType() throws InterpreterException { return null; } public int getProgress(InterpreterContext interpreterContext) throws InterpreterException { return 0; } } After that I configured pom.xml file for my interpreter as it was shown in documentation. The pom.xml file: <?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0"; xmlns:xsi=" http://www.w3.org/2001/XMLSchema-instance"; xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd";> <modelVersion>4.0.0</modelVersion> <groupId>adrax</groupId> <artifactId>geo-interpreter</artifactId> <version>0.8.0</version> <parent> <artifactId>interpreter-parent</artifactId> <groupId>org.apache.zeppelin</groupId> <version>0.8.0</version> <relativePath>../interpreter-parent</relativePath> </parent> <dependencies> <dependency> <groupId>org.apache.zeppelin</groupId> <artifactId>zeppelin-interpreter</artifactId> <version>${project.version}</version> <scope>provided</scope> </dependency> </dependencies> <build> <plugins> <plugin> <artifactId>maven-enforcer-plugin</artifactId> </plugin> <plugin> <artifactId>maven-dependency-plugin</artifactId> </plugin> <plugin> <artifactId>maven-resources-plugin</artifactId> </plugin> </plugins> </build> </project> Next, I created “zeppelin-site.xml” from template added my interpreter to “zeppelin.interpreters” property like this: . . . <property> <name>zeppelin.interpreters</name> <value>…,adrax.GeoInterpreter</value> </property> . . . Then I put interpreter’s jar with “interpreter-setting.json” to “interpreter” folder. My interpreter-setting.json: [ { "group": "geo", "name": "geo", "className": "adrax.GeoInterpreter", "editor": { "language": "java", "editOnDblClick": false, "completionKey": "TAB" } } ] Finally, I tried to run Zeppelin (zeppelin.cmd) with my interpreter and got several errors, the whole server log: Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=512m; support was removed in 8.0 SLF4J: Class path contains multiple SLF4J bindings. SLF4J: Found binding in [jar:file:/C:/Users/Admin/Documents/Development/Java/Geonotebook/zeppelin-0.8.0-bin-netinst/lib/interpreter/slf4j-log4j12-1.7.10.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: Found binding in [jar:file:/C:/Users/Admin/Documents/Development/Java/Geonotebook/zeppelin-0.8.0-bin-netinst/lib/slf4j-log4j12-1.7.10.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation. SLF4J: Actual binding is of type [org.slf4j.impl.Log4jLoggerFactory] INFO [2019-01-20 20:26:45,332] ({main} ZeppelinConfiguration.java[create]:121) - Load configuration from file:/C:/Users/Admin/Documents/Development/Java/Geonotebook/zeppelin-0.8.0-bin-netinst/conf/zeppelin-site.xml INFO [2019-01-20 20:26:45,395] ({main} ZeppelinConfiguration.java[create]:129) - Server Host: 0.0.0.0 INFO [2019-01-20 20:26:45,396] ({main} ZeppelinConfiguration.java[create]:131) - Server Port: 8080 INFO [2019-01-20 20:26:45,396] ({main} ZeppelinConfiguration.java[create]:135) - Context Path: / INFO [2019-01-20 20:26:45,397] ({main} ZeppelinConfiguration.java[create]:136) - Zeppelin Version: 0.8.0 INFO [2019-01-20 20:26:45,440] ({main} Log.java[initialized]:186) - Logging initialized @7383ms INFO [2019-01-20 20:26:45,501] ({main} ZeppelinServer.java[setupWebAppContext]:387) - ZeppelinServer Webapp path: C:\Users\Admin\Documents\Development\Java\Geonotebook\zeppelin-0.8.0-bin-netinst\webapps INFO [2019-01-20 20:26:45,573] ({main} ZeppelinServer.java[main]:213) - Starting zeppelin server INFO [2019-01-20 20:26:45,576] ({main} Server.java[doStart]:327) - jetty-9.2.15.v20160210 INFO [2019-01-20 20:28:17,850] ({main} StandardDescriptorProcessor.java[visitServlet]:297) - NO JSP Support for /, did not find org.eclipse.jetty.jsp.JettyJspServlet WARN [2019-01-20 20:28:17,928] ({main} ServletHolder.java[getNameOfJspClass]:923) - Unable to make identifier for jsp rest trying rest instead WARN [2019-01-20 20:28:18,294] ({main} ZeppelinConfiguration.java[getConfigFSDir]:527) - zeppelin.config.fs.dir is not specified, fall back to local conf directory zeppelin.conf.dir WARN [2019-01-20 20:28:18,294] ({main} ZeppelinConfiguration.java[getConfigFSDir]:527) - zeppelin.config.fs.dir is not specified, fall back to local conf directory zeppelin.conf.dir DEBUG [2019-01-20 20:28:18,307] ({main} InterpreterSettingManager.java[<init>]:148) - InterpreterRootPath: C:\Users\Admin\Documents\Development\Java\Geonotebook\zeppelin-0.8.0-bin-netinst\interpreter INFO [2019-01-20 20:28:18,393] ({main} InterpreterSettingManager.java[<init>]:163) - Using RecoveryStorage: org.apache.zeppelin.interpreter.recovery.NullRecoveryStorage INFO [2019-01-20 20:28:18,395] ({main} InterpreterSettingManager.java[<init>]:167) - Using LifecycleManager: org.apache.zeppelin.interpreter.lifecycle.NullLifecycleManager WARN [2019-01-20 20:28:18,431] ({main} InterpreterSettingManager.java[init]:329) - No interpreter-setting.json found in C:\Users\Admin\Documents\Development\Java\Geonotebook\zeppelin-0.8.0-bin-netinst\interpreter\${ interpreter.name} DEBUG [2019-01-20 20:28:18,441] ({main} InterpreterSettingManager.java[registerInterpreterFromPath]:371) - Reading interpreter-setting.json from file C:\Users\Admin\Documents\Development\Java\Geonotebook\zeppelin-0.8.0-bin-netinst\interpreter\geo-interpreter\interpreter-setting.json WARN [2019-01-20 20:28:18,453] ({main} ContextHandler.java[log]:2062) - unavailable MultiException stack 1 of 1 java.lang.NullPointerException at java.util.HashMap.putMapEntries(Unknown Source) at java.util.HashMap.putAll(Unknown Source) at org.apache.zeppelin.interpreter.InterpreterSettingManager.registerInterpreterSetting(InterpreterSettingManager.java:405) at org.apache.zeppelin.interpreter.InterpreterSettingManager.registerInterpreterFromPath(InterpreterSettingManager.java:374) at org.apache.zeppelin.interpreter.InterpreterSettingManager.init(InterpreterSettingManager.java:327) at org.apache.zeppelin.interpreter.InterpreterSettingManager.<init>(InterpreterSettingManager.java:171) at org.apache.zeppelin.interpreter.InterpreterSettingManager.<init>(InterpreterSettingManager.java:131) at org.apache.zeppelin.server.ZeppelinServer.<init>(ZeppelinServer.java:151) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) at java.lang.reflect.Constructor.newInstance(Unknown Source) at org.glassfish.hk2.utilities.reflection.ReflectionHelper.makeMe(ReflectionHelper.java:1375) at org.jvnet.hk2.internal.Utilities.justCreate(Utilities.java:1083) at org.jvnet.hk2.internal.ServiceLocatorImpl.create(ServiceLocatorImpl.java:978) at org.jvnet.hk2.internal.ServiceLocatorImpl.createAndInitialize(ServiceLocatorImpl.java:1082) at org.jvnet.hk2.internal.ServiceLocatorImpl.createAndInitialize(ServiceLocatorImpl.java:1074) at org.glassfish.jersey.inject.hk2.AbstractHk2InjectionManager.createAndInitialize(AbstractHk2InjectionManager.java:213) at org.glassfish.jersey.inject.hk2.ImmediateHk2InjectionManager.createAndInitialize(ImmediateHk2InjectionManager.java:54) at org.glassfish.jersey.server.ApplicationConfigurator.createApplication(ApplicationConfigurator.java:138) at org.glassfish.jersey.server.ApplicationConfigurator.init(ApplicationConfigurator.java:96) at org.glassfish.jersey.server.ApplicationHandler.lambda$initialize$0(ApplicationHandler.java:313) at org.glassfish.jersey.server.ApplicationHandler$$Lambda$44/2067180044.accept(Unknown Source) at java.util.Arrays$ArrayList.forEach(Unknown Source) at org.glassfish.jersey.server.ApplicationHandler.initialize(ApplicationHandler.java:313) at org.glassfish.jersey.server.ApplicationHandler.<init>(ApplicationHandler.java:282) at org.glassfish.jersey.servlet.WebComponent.<init>(WebComponent.java:335) at org.glassfish.jersey.servlet.ServletContainer.init(ServletContainer.java:178) at org.glassfish.jersey.servlet.ServletContainer.init(ServletContainer.java:370) at javax.servlet.GenericServlet.init(GenericServlet.java:244) at org.eclipse.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:616) at org.eclipse.jetty.servlet.ServletHolder.initialize(ServletHolder.java:396) at org.eclipse.jetty.servlet.ServletHandler.initialize(ServletHandler.java:871) at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:298) at org.eclipse.jetty.webapp.WebAppContext.startWebapp(WebAppContext.java:1349) at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1342) at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:741) at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:505) at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68) at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:132) at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:114) at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:61) at org.eclipse.jetty.server.handler.ContextHandlerCollection.doStart(ContextHandlerCollection.java:163) at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68) at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:132) at org.eclipse.jetty.server.Server.start(Server.java:387) at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:114) at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:61) at org.eclipse.jetty.server.Server.doStart(Server.java:354) at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68) at org.apache.zeppelin.server.ZeppelinServer.main(ZeppelinServer.java:215) ╤П╨╜╨▓ 20, 2019 8:28:18 PM org.glassfish.jersey.internal.Errors logErrors WARNING: The following warnings have been detected: WARNING: A HTTP GET method, public javax.ws.rs.core.Response org.apache.zeppelin.rest.InterpreterRestApi.listInterpreter(java.lang.String), should not consume any entity. WARNING: A HTTP GET method, public javax.ws.rs.core.Response org.apache.zeppelin.rest.CredentialRestApi.getCredentials(java.lang.String) throws java.io.IOException,java.lang.IllegalArgumentException, should not consume any entity. WARNING: The (sub)resource method createNote in org.apache.zeppelin.rest.NotebookRestApi contains empty path annotation. WARNING: The (sub)resource method getNoteList in org.apache.zeppelin.rest.NotebookRestApi contains empty path annotation. WARN [2019-01-20 20:28:18,992] ({main} WebAppContext.java[doStart]:514) - Failed startup of context o.e.j.w.WebAppContext@12028586 {/,file:/C:/Users/Admin/Documents/Development/Java/Geonotebook/zeppelin-0.8.0-bin-netinst/webapps/webapp/,STARTING}{C:\Users\Admin\Documents\Development\Java\Geonotebook\zeppelin-0.8.0-bin-netinst\zeppelin-web-0.8.0.war} javax.servlet.ServletException: rest@355bd4 ==org.glassfish.jersey.servlet.ServletContainer,-1,false at org.eclipse.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:637) at org.eclipse.jetty.servlet.ServletHolder.initialize(ServletHolder.java:396) at org.eclipse.jetty.servlet.ServletHandler.initialize(ServletHandler.java:871) at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:298) at org.eclipse.jetty.webapp.WebAppContext.startWebapp(WebAppContext.java:1349) at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1342) at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:741) at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:505) at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68) at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:132) at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:114) at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:61) at org.eclipse.jetty.server.handler.ContextHandlerCollection.doStart(ContextHandlerCollection.java:163) at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68) at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:132) at org.eclipse.jetty.server.Server.start(Server.java:387) at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:114) at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:61) at org.eclipse.jetty.server.Server.doStart(Server.java:354) at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68) at org.apache.zeppelin.server.ZeppelinServer.main(ZeppelinServer.java:215) Caused by: A MultiException has 1 exceptions. They are: 1. java.lang.NullPointerException at org.jvnet.hk2.internal.Utilities.justCreate(Utilities.java:1085) at org.jvnet.hk2.internal.ServiceLocatorImpl.create(ServiceLocatorImpl.java:978) at org.jvnet.hk2.internal.ServiceLocatorImpl.createAndInitialize(ServiceLocatorImpl.java:1082) at org.jvnet.hk2.internal.ServiceLocatorImpl.createAndInitialize(ServiceLocatorImpl.java:1074) at org.glassfish.jersey.inject.hk2.AbstractHk2InjectionManager.createAndInitialize(AbstractHk2InjectionManager.java:213) at org.glassfish.jersey.inject.hk2.ImmediateHk2InjectionManager.createAndInitialize(ImmediateHk2InjectionManager.java:54) at org.glassfish.jersey.server.ApplicationConfigurator.createApplication(ApplicationConfigurator.java:138) at org.glassfish.jersey.server.ApplicationConfigurator.init(ApplicationConfigurator.java:96) at org.glassfish.jersey.server.ApplicationHandler.lambda$initialize$0(ApplicationHandler.java:313) at org.glassfish.jersey.server.ApplicationHandler$$Lambda$44/2067180044.accept(Unknown Source) at java.util.Arrays$ArrayList.forEach(Unknown Source) at org.glassfish.jersey.server.ApplicationHandler.initialize(ApplicationHandler.java:313) at org.glassfish.jersey.server.ApplicationHandler.<init>(ApplicationHandler.java:282) at org.glassfish.jersey.servlet.WebComponent.<init>(WebComponent.java:335) at org.glassfish.jersey.servlet.ServletContainer.init(ServletContainer.java:178) at org.glassfish.jersey.servlet.ServletContainer.init(ServletContainer.java:370) at javax.servlet.GenericServlet.init(GenericServlet.java:244) at org.eclipse.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:616) ... 20 more Caused by: java.lang.NullPointerException at java.util.HashMap.putMapEntries(Unknown Source) at java.util.HashMap.putAll(Unknown Source) at org.apache.zeppelin.interpreter.InterpreterSettingManager.registerInterpreterSetting(InterpreterSettingManager.java:405) at org.apache.zeppelin.interpreter.InterpreterSettingManager.registerInterpreterFromPath(InterpreterSettingManager.java:374) at org.apache.zeppelin.interpreter.InterpreterSettingManager.init(InterpreterSettingManager.java:327) at org.apache.zeppelin.interpreter.InterpreterSettingManager.<init>(InterpreterSettingManager.java:171) at org.apache.zeppelin.interpreter.InterpreterSettingManager.<init>(InterpreterSettingManager.java:131) at org.apache.zeppelin.server.ZeppelinServer.<init>(ZeppelinServer.java:151) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) at java.lang.reflect.Constructor.newInstance(Unknown Source) at org.glassfish.hk2.utilities.reflection.ReflectionHelper.makeMe(ReflectionHelper.java:1375) at org.jvnet.hk2.internal.Utilities.justCreate(Utilities.java:1083) ... 37 more INFO [2019-01-20 20:28:19,072] ({main} AbstractConnector.java[doStart]:266) - Started ServerConnector@5ed190be {HTTP/1.1}{0.0.0.0:8080} INFO [2019-01-20 20:28:19,073] ({main} Server.java[doStart]:379) - Started @101031ms INFO [2019-01-20 20:28:19,073] ({main} ZeppelinServer.java[main]:223) - Done, zeppelin server started Even though log said that zeppelin server has been started, after opening localhost:8080 I got “HTTP ERROR: 503 Problem accessing. Reason: Service Unavailable”. I run Apache Zeppelin 0.8.0 on Windows 10. Please, help to figure out what I am doing wrong. Maybe I am missing something important in documentation. Sincerely yours, Nikita Terlych
