Zack Marsh created AMBARI-18390:
-----------------------------------
Summary: Configuration warnings during "Add Service" Wizard
include seemingly nonsensical heapsize recommendations
Key: AMBARI-18390
URL: https://issues.apache.org/jira/browse/AMBARI-18390
Project: Ambari
Issue Type: Bug
Components: ambari-web
Affects Versions: 2.4.0
Environment: SLES11 SP3
Reporter: Zack Marsh
On an HDP 2.5.0.0 + Ambari 2.4.0.1 cluster, I'm prompted with misconfiguration
warnings while adding a service (e.g. Kafka in this case).
{code}
Warning, Ambari Metrics, hbase_master_heapsize, 896
246061 MB RAM is unused on the host zeus.labs.teradata.com based on components
assigned.
Consider allocating 48905 MB to metrics_collector_heapsize in ams-env, 32768 MB
to hbase_master_heapsize in ams-hbase-env
HBase Master Heap Size. In embedded mode, total heap size is sum of master and
regionserver heap sizes.
{code}
{code}
Warning, Ambari Metrics, hbase_master_xmn_size, 256
Consider allocating 3968 MB to use up some unused memory on host
HBase Master maximum value for young generation heap size.
{code}
See attached file Ambari_Metrics_Warnings_1.png for a screenshot of Ambari's
warnings.
So per the recommendations, I set:
* metrics_collector_heapsize = 48905 MB
* hbase_master_heapsize = 32768 MB
* hbase_master_xmn_size = 3968 MB
Saved changes and restarted Ambari Metrics.
Now when I try adding a service again, I'm prompted with the following warnings:
{code}
Warning, Ambari Metrics, hbase_master_heapsize, 32768
165796 MB RAM is unused on the host zeus1.labs.teradata.com based on components
assigned. Consider allocating 81245 MB to metrics_collector_heapsize in
ams-env, 32768 MB to hbase_master_heapsize in ams-hbase-env
HBase Master Heap Size. In embedded mode, total heap size is sum of master and
regionserver heap sizes.
{code}
{code}
Warning, Ambari Metrics, hbase_master_xmn_size, 3968
Value is lesser than the recommended minimum Xmn size of 4025 (12% of
hbase_master_heapsize + hbase_regionserver_heapsize)
Consider allocating 3968 MB to use up some unused memory on host
HBase Master maximum value for young generation heap size.
{code}
See attached file Ambari_Metrics_Warnings_2.png for a screenshot of Ambari's
warnings.
Set:
* metrics_collector_heapsize = 81245 MB
* hbase_master_xmn_size = 4025 MB
Saved changes and restarted Ambari Metrics.
Now when I try adding a service for a third time, I'm prompted with the
following warnings:
{code}
Warning, Ambari Metrics, hbase_master_heapsize, 32768
133456 MB RAM is unused on the host zeus1.labs.teradata.com based on components
assigned. Consider allocating 107117 MB to metrics_collector_heapsize in
ams-env, 32768 MB to hbase_master_heapsize in ams-hbase-env
HBase Master Heap Size. In embedded mode, total heap size is sum of master and
regionserver heap sizes.
{code}
{code}
Warning, Ambari Metrics, hbase_master_xmn_size, 4025
Consider allocating 3968 MB to use up some unused memory on host
HBase Master maximum value for young generation heap size.
{code}
See attached file Ambari_Metrics_Warnings_3.png for a screenshot of Ambari's
warnings.
At this point I stopped because the recommended settings were already
non-sensical.
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