java.lang.RuntimeException: org.apache.druid.java.util.common.IOE: No known server

i create two task load data from kafka,but these task always all fail. these are broken.log.

could u help me?

java.lang.RuntimeException: org.apache.druid.java.util.common.IOE: No known server

at org.apache.druid.sql.calcite.schema.SystemSchema.getTasks(SystemSchema.java:737) ~[druid-sql-0.16.0-incubating.jar:0.16.0-incubating]

at org.apache.druid.sql.calcite.schema.SystemSchema.access$800(SystemSchema.java:95) ~[druid-sql-0.16.0-incubating.jar:0.16.0-incubating]

at org.apache.druid.sql.calcite.schema.SystemSchema$TasksTable.scan(SystemSchema.java:695) ~[druid-sql-0.16.0-incubating.jar:0.16.0-incubating]

at org.apache.calcite.interpreter.TableScanNode.createScannable(TableScanNode.java:116) ~[calcite-core-1.17.0.jar:1.17.0]

at org.apache.calcite.interpreter.TableScanNode.create(TableScanNode.java:93) ~[calcite-core-1.17.0.jar:1.17.0]

at org.apache.calcite.interpreter.Nodes$CoreCompiler.visit(Nodes.java:69) ~[calcite-core-1.17.0.jar:1.17.0]

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_232]

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_232]

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_232]

at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_232]

at org.apache.calcite.util.ReflectUtil.invokeVisitorInternal(ReflectUtil.java:257) ~[calcite-core-1.17.0.jar:1.17.0]

at org.apache.calcite.util.ReflectUtil.invokeVisitor(ReflectUtil.java:214) ~[calcite-core-1.17.0.jar:1.17.0]

at org.apache.calcite.util.ReflectUtil$1.invokeVisitor(ReflectUtil.java:464) ~[calcite-core-1.17.0.jar:1.17.0]

at org.apache.calcite.interpreter.Interpreter$CompilerImpl.visit(Interpreter.java:451) ~[calcite-core-1.17.0.jar:1.17.0]

at org.apache.calcite.interpreter.Nodes$CoreCompiler.visit(Nodes.java:42) ~[calcite-core-1.17.0.jar:1.17.0]

at org.apache.calcite.rel.SingleRel.childrenAccept(SingleRel.java:72) ~[calcite-core-1.17.0.jar:1.17.0]

at org.apache.calcite.interpreter.Interpreter$CompilerImpl.visit(Interpreter.java:447) ~[calcite-core-1.17.0.jar:1.17.0]

at org.apache.calcite.interpreter.Nodes$CoreCompiler.visit(Nodes.java:42) ~[calcite-core-1.17.0.jar:1.17.0]

at org.apache.calcite.rel.SingleRel.childrenAccept(SingleRel.java:72) ~[calcite-core-1.17.0.jar:1.17.0]

at org.apache.calcite.interpreter.Interpreter$CompilerImpl.visit(Interpreter.java:447) ~[calcite-core-1.17.0.jar:1.17.0]

at org.apache.calcite.interpreter.Nodes$CoreCompiler.visit(Nodes.java:42) ~[calcite-core-1.17.0.jar:1.17.0]

at org.apache.calcite.interpreter.Interpreter$CompilerImpl.visitRoot(Interpreter.java:405) ~[calcite-core-1.17.0.jar:1.17.0]

at org.apache.calcite.interpreter.Interpreter.(Interpreter.java:88) ~[calcite-core-1.17.0.jar:1.17.0]

at org.apache.calcite.interpreter.Bindables.help(Bindables.java:137) ~[calcite-core-1.17.0.jar:1.17.0]

at org.apache.calcite.interpreter.Bindables.access$000(Bindables.java:85) ~[calcite-core-1.17.0.jar:1.17.0]

at org.apache.calcite.interpreter.Bindables$BindableSort.bind(Bindables.java:429) ~[calcite-core-1.17.0.jar:1.17.0]

at org.apache.druid.sql.calcite.planner.DruidPlanner.lambda$planWithBindableConvention$1(DruidPlanner.java:199) ~[druid-sql-0.16.0-incubating.jar:0.16.0-incubating]

at org.apache.druid.sql.calcite.planner.PlannerResult.run(PlannerResult.java:54) ~[druid-sql-0.16.0-incubating.jar:0.16.0-incubating]

at org.apache.druid.sql.SqlLifecycle.execute(SqlLifecycle.java:230) ~[druid-sql-0.16.0-incubating.jar:0.16.0-incubating]

at org.apache.druid.sql.http.SqlResource.doPost(SqlResource.java:108) [druid-sql-0.16.0-incubating.jar:0.16.0-incubating]

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_232]

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_232]

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_232]

at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_232]

at com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60) [jersey-server-1.19.3.jar:1.19.3]

at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$ResponseOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:205) [jersey-server-1.19.3.jar:1.19.3]

at com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75) [jersey-server-1.19.3.jar:1.19.3]

at com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:302) [jersey-server-1.19.3.jar:1.19.3]

at com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108) [jersey-server-1.19.3.jar:1.19.3]

at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147) [jersey-server-1.19.3.jar:1.19.3]

at com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84) [jersey-server-1.19.3.jar:1.19.3]

at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1542) [jersey-server-1.19.3.jar:1.19.3]

at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1473) [jersey-server-1.19.3.jar:1.19.3]

at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1419) [jersey-server-1.19.3.jar:1.19.3]

at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1409) [jersey-server-1.19.3.jar:1.19.3]

at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:409) [jersey-servlet-1.19.3.jar:1.19.3]

at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:558) [jersey-servlet-1.19.3.jar:1.19.3]

at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:733) [jersey-servlet-1.19.3.jar:1.19.3]

at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) [javax.servlet-api-3.1.0.jar:3.1.0]

at com.google.inject.servlet.ServletDefinition.doServiceImpl(ServletDefinition.java:286) [guice-servlet-4.1.0.jar:?]

at com.google.inject.servlet.ServletDefinition.doService(ServletDefinition.java:276) [guice-servlet-4.1.0.jar:?]

at com.google.inject.servlet.ServletDefinition.service(ServletDefinition.java:181) [guice-servlet-4.1.0.jar:?]

at com.google.inject.servlet.ManagedServletPipeline.service(ManagedServletPipeline.java:91) [guice-servlet-4.1.0.jar:?]

at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:85) [guice-servlet-4.1.0.jar:?]

at com.google.inject.servlet.ManagedFilterPipeline.dispatch(ManagedFilterPipeline.java:120) [guice-servlet-4.1.0.jar:?]

at com.google.inject.servlet.GuiceFilter.doFilter(GuiceFilter.java:135) [guice-servlet-4.1.0.jar:?]

at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1642) [jetty-servlet-9.4.10.v20180503.jar:9.4.10.v20180503]

Hi Lei:

There shall be more logs before this error message. Can you show us more?

Further more, please make sure all services are up and running correctly. The Broker error you attached here basically said there were some service missing.

Thanks