How to comment a property in nifi.properties or bootstrap using cloudera manager?

Question

Hi, I was trying to use nifi.provenance.repository.implementation=org.apache.nifi.provenance.WriteAheadProvenanceRepository. To do so i have to comment java.arg.13=-XX:+UseG1GC to get rid of any performance issues as per https://community.cloudera.com/t5/Community-Articles/HDF-CFM-NIFI-Best-practices-for-setting-up-a-high/ta-p/244999However i find it difficult on how to do it via Cloudera Manager. Please help.

MattWho · Accepted Answer

@bsivalingam83

The ability to "ignore" properties in various NiFi config files was added with the CFM 1.0.1 release.
Screen Shot 2021-02-10 at 1.21.13 PM.png

With older CFM versions (1.0.0) you can set a safety valve to overwrite the current set java.arg.13 value with something else:
Screen Shot 2021-02-10 at 1.24.30 PM.png

Above simply defines a key=value pair which would simply not be used by NiFi bootstrap. End result, NiFi no longer using G1GC and instead using the default Garbage Collector for your version of Java being used.

Hope this helps,

Matt

tjangid · Answer

Hello @bsivalingam83

You may navigate to NiFi configuration and search for ignore. To remove the “java.arg.13=-XX:+UseG1GC” you can add a property under the “bootstrap.conf ignored properties” section for “java.arg.13". Kindly let me know if this helps.

Br,

Tarun

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