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https://issues.apache.org/jira/browse/AMBARI-25611?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tamas Payer resolved AMBARI-25611.
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Assignee: Tamas Payer
Resolution: Workaround
> After purging AMS database "TimelineMetricMetadataKey is null" error is thrown
> ------------------------------------------------------------------------------
>
> Key: AMBARI-25611
> URL: https://issues.apache.org/jira/browse/AMBARI-25611
> Project: Ambari
> Issue Type: Task
> Components: ambari-metrics
> Affects Versions: 2.7.5
> Reporter: Tamas Payer
> Assignee: Tamas Payer
> Priority: Minor
>
> After purging the Metrics Collector's database the following error message
> appears in the logs:
> {code:java}
> 2021-01-15 11:30:48,921 ERROR
> org.apache.ambari.metrics.core.timeline.discovery.TimelineMetricMetadataManager:
> TimelineMetricMetadataKey is null for : [-1, -1, -64, -112, -85, -17, 39,
> -84, -121, 19, -118, -36, -104, -21, -7, 110, 61, -97, -56, 10]{code}
>
> *The following steps were used to purge the database:*
> * +Get some configuration values:+
> * Get _hbase.rootdir_. *hbase.rootdir = /user/ams/hbase*
> * Get _hbase.tmp.dir_. *hbase.tmp.dir =
> /var/lib/ambari-metrics-collector/hbase-tmp*
> * Get _hbase.zookeeper.property.datadir_. *hbase.zookeeper.property.datadir
> = ${hbase.tmp.dir}/zookeeper*
> * Get _phoenix.spool.directory_. *phoenix.spool.directory =
> ${hbase.tmp.dir}/phoenix-spool*
> * Get ‘ZooKeeper Znode Parent’. *ZooKeeper Znode Parent =
> /ams-hbase-unsecure*
> * *Stop AMS and set it to Maintenance Mode*
> * Remove the HBase database
> * _su hdfs_
> * _hdfs dfs -ls /user/ams/hbase_
> * _hdfs dfs -rm -r /user/ams/hbase_
> * _exit (back to root from hdfs user)_
> * Remove the AMS Zookeeper data *on both Collector Nodes*
> * _su ams_
> * _ls /var/lib/ambari-metrics-collector/hbase-tmp/zookeeper/_
> * _rm -rf /var/lib/ambari-metrics-collector/hbase-tmp/zookeeper/*_
> * Remove any Phoenix spool files *on both Collector Nodes*
> * _ls /var/lib/ambari-metrics-collector/hbase-tmp/phoenix-spool/_
> * _rm -rf /var/lib/ambari-metrics-collector/hbase-tmp/phoenix-spool/*_
> * _exit_ (back to root from ams user)
> * Connect to the cluster zookeeper instance and delete the ‘_ZooKeeper Znode
> Parent’/meta-region-server_ node
> * _/usr/hdp/current/zookeeper-client/bin/zkCli.sh -server localhost:2181_
> * _[zk: localhost:2181(CONNECTED) 0]_
> * _rmr /ams-hbase-unsecure/meta-region-server_
> * _quit_
> * Restart AMS
>
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