[GitHub] zyh5160 removed a comment on issue #1511: Exception while fetching data (/getClusterTopology) : null

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zyh5160 removed a comment on issue #1511: Exception while fetching data (/getClusterTopology) : null
URL: https://github.com/apache/incubator-skywalking/issues/1511#issuecomment-409513197
 
 
   thank you very much for your reply！
   After I restarted all the applications, Tracing is OK, but when I open the dashboard, I still have this problem.
   `Exception while fetching data (/getTopNApplicationThroughput) : null`. 
   
   exceptions still exists.
   
   
   `2018-08-01 17:25:48,873 - graphql.execution.SimpleDataFetcherExceptionHandler -739637 [qtp1899433964-137] WARN  [] - Exception while fetching data (/getTopNApplicationThroughput) : null
   java.lang.NullPointerException: null
           at org.apache.skywalking.apm.collector.ui.service.ApplicationService.lambda$getTopNApplicationThroughput$2(ApplicationService.java:108) ~[collector-ui-jetty-provider-5.0.0-beta2.jar:5.0.0-beta2]
           at java.lang.Iterable.forEach(Iterable.java:75) ~[?:1.8.0_144]
           at org.apache.skywalking.apm.collector.ui.service.ApplicationService.getTopNApplicationThroughput(ApplicationService.java:107) ~[collector-ui-jetty-provider-5.0.0-beta2.jar:5.0.0-beta2]
           at org.apache.skywalking.apm.collector.ui.query.OverViewLayerQuery.getTopNApplicationThroughput(OverViewLayerQuery.java:147) ~[collector-ui-jetty-provider-5.0.0-beta2.jar:5.0.0-beta2]
           at org.apache.skywalking.apm.collector.ui.query.OverViewLayerQueryMethodAccess.invoke(Unknown Source) ~[reflectasm-1.11.3.jar:5.0.0-beta2]
           at com.coxautodev.graphql.tools.MethodFieldResolverDataFetcher.get(MethodFieldResolver.kt:132) ~[graphql-java-tools-4.3.0.jar:?]
           at graphql.execution.ExecutionStrategy.fetchField(ExecutionStrategy.java:219) [graphql-java-6.0.jar:?]
           at graphql.execution.ExecutionStrategy.resolveField(ExecutionStrategy.java:165) [graphql-java-6.0.jar:?]
           at graphql.execution.AsyncExecutionStrategy.execute(AsyncExecutionStrategy.java:55) [graphql-java-6.0.jar:?]
           at graphql.execution.Execution.executeOperation(Execution.java:154) [graphql-java-6.0.jar:?]
           at graphql.execution.Execution.execute(Execution.java:98) [graphql-java-6.0.jar:?]
           at graphql.GraphQL.execute(GraphQL.java:546) [graphql-java-6.0.jar:?]
           at graphql.GraphQL.parseValidateAndExecute(GraphQL.java:488) [graphql-java-6.0.jar:?]
           at graphql.GraphQL.executeAsync(GraphQL.java:463) [graphql-java-6.0.jar:?]
           at graphql.GraphQL.execute(GraphQL.java:394) [graphql-java-6.0.jar:?]`
   
   Is it that I missed some steps?
   
   Thank you again, master！

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