You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@nifi.apache.org by "ASF subversion and git services (JIRA)" <ji...@apache.org> on 2016/10/05 13:00:27 UTC
[jira] [Commented] (NIFI-2858) getSystemLoadAverage of
OperatingSystemMXBean sometimes returns zero or a negative value.
[ https://issues.apache.org/jira/browse/NIFI-2858?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15548638#comment-15548638 ]
ASF subversion and git services commented on NIFI-2858:
-------------------------------------------------------
Commit 2c907c63af921a9968bafd87903c93fe732c692f in nifi's branch refs/heads/master from [~combine]
[ https://git-wip-us.apache.org/repos/asf?p=nifi.git;h=2c907c6 ]
NIFI-2858:
- getSystemLoadAverage of OperatingSystemMXBean sometimes returns a negative value.
- ProcessorLoadAverage sets -1.0. It added a defensive logic.
- When load average is zero(load average: 0.00, 0.02, 0.04), systemLoad is zero.
- This closes #1091
> getSystemLoadAverage of OperatingSystemMXBean sometimes returns zero or a negative value.
> -----------------------------------------------------------------------------------------
>
> Key: NIFI-2858
> URL: https://issues.apache.org/jira/browse/NIFI-2858
> Project: Apache NiFi
> Issue Type: Bug
> Components: Core Framework
> Affects Versions: 1.1.0
> Reporter: Byunghwa Yun
>
> When NiFi cluster is busy, Sometimes Cluster of Global Menu throws below an exception.
> So, I was tracking that exception to find a problem that getSystemLoadAverage of OperatingSystemMXBean sometimes returns zero or a negative value.
> 2016-10-04 14:53:20,488 ERROR [NiFi Web Server-40942] o.a.nifi.web.api.config.ThrowableMapper An unexpected error has occurred: java.lang.NullPointerException. Returning Internal Server Error response.
> java.lang.NullPointerException: null
> at org.apache.nifi.cluster.manager.StatusMerger.merge(StatusMerger.java:576) ~[nifi-framework-cluster-1.1.0-SNAPSHOT.jar:1.1.0-SNAPSHOT]
> at org.apache.nifi.cluster.manager.StatusMerger.merge(StatusMerger.java:548) ~[nifi-framework-cluster-1.1.0-SNAPSHOT.jar:1.1.0-SNAPSHOT]
> at org.apache.nifi.cluster.coordination.http.endpoints.SystemDiagnosticsEndpointMerger.mergeResponses(SystemDiagnosticsEndpointMerger.java:69) ~[nifi-framework-cluster-1.1.0-SNAPSHOT.jar:1.1.0-SNAPSHOT]
> at org.apache.nifi.cluster.coordination.http.endpoints.SystemDiagnosticsEndpointMerger.mergeResponses(SystemDiagnosticsEndpointMerger.java:31) ~[nifi-framework-cluster-1.1.0-SNAPSHOT.jar:1.1.0-SNAPSHOT]
> at org.apache.nifi.cluster.coordination.http.endpoints.AbstractNodeStatusEndpoint.mergeResponses(AbstractNodeStatusEndpoint.java:41) ~[nifi-framework-cluster-1.1.0-SNAPSHOT.jar:1.1.0-SNAPSHOT]
> at org.apache.nifi.cluster.coordination.http.endpoints.AbstractSingleDTOEndpoint.merge(AbstractSingleDTOEndpoint.java:48) ~[nifi-framework-cluster-1.1.0-SNAPSHOT.jar:1.1.0-SNAPSHOT]
> at org.apache.nifi.cluster.coordination.http.StandardHttpResponseMerger.mergeResponses(StandardHttpResponseMerger.java:179) ~[nifi-framework-cluster-1.1.0-SNAPSHOT.jar:1.1.0-SNAPSHOT]
> at org.apache.nifi.cluster.coordination.http.replication.StandardAsyncClusterResponse.getMergedResponse(StandardAsyncClusterResponse.java:145) ~[nifi-framework-cluster-1.1.0-SNAPSHOT.jar:1.1.0-SNAPSHOT]
> at org.apache.nifi.cluster.coordination.http.replication.StandardAsyncClusterResponse.awaitMergedResponse(StandardAsyncClusterResponse.java:160) ~[nifi-framework-cluster-1.1.0-SNAPSHOT.jar:1.1.0-SNAPSHOT]
> at org.apache.nifi.web.api.SystemDiagnosticsResource.getSystemDiagnostics(SystemDiagnosticsResource.java:141) ~[classes/:na]
> at sun.reflect.GeneratedMethodAccessor988.invoke(Unknown Source) ~[na:na]
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_51]
> at java.lang.reflect.Method.invoke(Method.java:497) ~[na:1.8.0_51]
> at com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60) ~[jersey-server-1.19.jar:1.19]
> at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$ResponseOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:205) ~[jersey-server-1.19.jar:1.19]
> at com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75) ~[jersey-server-1.19.jar:1.19]
> at com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:302) ~[jersey-server-1.19.jar:1.19]
> at com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108) ~[jersey-server-1.19.jar:1.19]
> at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147) ~[jersey-server-1.19.jar:1.19]
> at com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84) ~[jersey-server-1.19.jar:1.19]
> at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1542) [jersey-server-1.19.jar:1.19]
> at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1473) [jersey-server-1.19.jar:1.19]
> at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1419) [jersey-server-1.19.jar:1.19]
> When systemLoad of SystemDiagnosticsFactory is zero or a negative value, it skips setting setProcessorLoadAverage of SystemDiagnostics.
> if (systemLoad > 0) {
> systemDiagnostics.setProcessorLoadAverage(systemLoad);
> }
> I think when getSystemLoadAverage returns a negative value, systemLoad sets -1.0 and returns zero, systemLoad sets zero.
> Thank you.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)