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https://issues.apache.org/jira/browse/KNOX-3022?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on KNOX-3022 started by Sandor Molnar.
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> Possible NPE at CM cluster configuration monitor startup due to cluster
> configuration file issues
> -------------------------------------------------------------------------------------------------
>
> Key: KNOX-3022
> URL: https://issues.apache.org/jira/browse/KNOX-3022
> Project: Apache Knox
> Issue Type: Bug
> Components: cm-discovery
> Affects Versions: 2.0.0, 1.6.0
> Reporter: Sandor Molnar
> Assignee: Sandor Molnar
> Priority: Critical
> Fix For: 2.1.0
>
>
> In KNOX-2869, we handled the case where
> {{$KNOX_DATA_DIR/cm-clusters/hCM_HOST_7183-Cluster_1.conf}} file was empty.
> However, it might be the same for the
> {{$KNOX_DATA_DIR/cm-clusters/hCM_HOST_7183-Cluster_1.ver}} file where
> previously persisted cluster configuration (with service/role details) is
> stored.
> If that file is empty, the following error is thrown:
> {noformat}
> 2024-03-18 19:01:34,840 ERROR discovery.cm
> (ClusterConfigurationFileStore.java:get(106)) - Failed to load persisted
> service configuration data for cluster monitor CM :
> com.fasterxml.jackson.databind.exc.MismatchedInputException: No content to
> map due to end-of-input
> at [Source: (sun.nio.ch.ChannelInputStream); line: 1, column: 0]
> 2024-03-18 19:01:34,841 FATAL knox.gateway (GatewayServer.java:main(193)) -
> Failed to start gateway: java.lang.NullPointerException
> java.lang.NullPointerException
> at
> org.apache.knox.gateway.topology.discovery.cm.monitor.ClouderaManagerClusterConfigurationMonitor.loadServiceConfiguration(ClouderaManagerClusterConfigurationMonitor.java:196)
> at
> org.apache.knox.gateway.topology.discovery.cm.monitor.ClouderaManagerClusterConfigurationMonitor.<init>(ClouderaManagerClusterConfigurationMonitor.java:103)
> at
> org.apache.knox.gateway.topology.discovery.cm.monitor.ClouderaManagerClusterConfigurationMonitorProvider.newInstance(ClouderaManagerClusterConfigurationMonitorProvider.java:35)
> at
> org.apache.knox.gateway.services.topology.impl.DefaultClusterConfigurationMonitorService.init(DefaultClusterConfigurationMonitorService.java:44)
> at
> org.apache.knox.gateway.services.DefaultGatewayServices.init(DefaultGatewayServices.java:137)
> at org.apache.knox.gateway.GatewayServer.main(GatewayServer.java:184)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at
> org.apache.knox.gateway.launcher.Invoker.invokeMainMethod(Invoker.java:68)
> at org.apache.knox.gateway.launcher.Invoker.invoke(Invoker.java:39)
> at org.apache.knox.gateway.launcher.Command.run(Command.java:99)
> at org.apache.knox.gateway.launcher.Launcher.run(Launcher.java:75)
> at org.apache.knox.gateway.launcher.Launcher.main(Launcher.java:52)
> {noformat}
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