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https://issues.apache.org/jira/browse/AMBARI-23393?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated AMBARI-23393:
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Labels: pull-request-available (was: )
> Ambari Requests Too Much Data From Hosts When Logging In
> --------------------------------------------------------
>
> Key: AMBARI-23393
> URL: https://issues.apache.org/jira/browse/AMBARI-23393
> Project: Ambari
> Issue Type: Bug
> Components: ambari-web
> Affects Versions: 2.7.0
> Reporter: Andrii Tkach
> Assignee: Andrii Tkach
> Priority: Critical
> Labels: pull-request-available
> Fix For: 2.7.0
>
>
> When first logging into Ambari, the web client makes the following request:
> GET api/v1/clusters/<clusterName>/hosts?fields=
> - Hosts/cpu_count
> - Hosts/host_name
> - Hosts/host_status
> - Hosts/ip
> - Hosts/last_agent_env
> - Hosts/last_heartbeat_time
> - Hosts/maintenance_state
> - Hosts/ph_cpu_count
> - Hosts/public_host_name
> - Hosts/rack_info
> - Hosts/total_mem
> - alerts_summary
> - host_components/HostRoles/desired_admin_state
> - host_components/HostRoles/display_name
> - host_components/HostRoles/maintenance_state
> - host_components/HostRoles/service_name
> - host_components/HostRoles/stale_configs
> - host_components/HostRoles/state
> - host_components/logging
> - stack_versions/HostStackVersions
> - stack_versions/repository_versions/RepositoryVersions/display_name
> - stack_versions/repository_versions/RepositoryVersions/id
> - stack_versions/repository_versions/RepositoryVersions/repository_version
> In a cluster with 100 hosts, this can cause a payload of over 200MB to be
> returned. The culprit seems to be the {{Hosts/last_agent_env}} property,
> specifically the {{activeJavaProcs}} key. If the hosts in the cluster are
> running a lot of Java processes, this can account for over 90% of the payload
> (roughly 180MB). This data takes 30 or more seconds for the server to
> serialize and stream to the socket.
> It looks like {{Hosts/last_agent_env}} isn't even needed after initially
> provisioning a host during the host checks, so it probably can be removed.
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