Impala Assignment locality concerning

Arf — Fri, 16 Sep 2022 12:37:49 GMT

Hi guys,

I'm getting this alert very often in impala. Please help

52.78% of assignments operating on local data over the past 15 minute(s). 95 local assignments. 180 total assignments. Warning threshold: 80.00%.

Re: Impala Assignment locality concerning

csguna — Fri, 15 Dec 2017 03:04:25 GMT

I dont kow if you have a custom trigger or a built in trigger for health test.

Is the health test showing warning or critical or bad ?

either way the test is to find the data locality in the host .

" Make sure that Impala Daemon is co-located with a DataNode, and that the IP address of each Impala Daemon matches the IP address of its co-located DataNode"

Please make sure if you have enabled the below properties in hdfs-site.xml

<property>
    <name>dfs.client.read.shortcircuit</name>
    <value>true</value>
</property>

<property>
    <name>dfs.domain.socket.path</name>
    <value>/var/run/hdfs-sockets/dn</value>
</property>

<property>
    <name>dfs.client.file-block-storage-locations.timeout.millis</name>
    <value>10000</value>
</property>

Reference

https://www.cloudera.com/documentation/enterprise/5-9-x/topics/impala_config_performance.html#config_performance

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Impala Assignment locality concerning

Re: Impala Assignment locality concerning