[improve][ci] Increase Maven max heap size to 2048M and tune GCLockerRetryAllocationCount

[lhotari]

Motivation

In CI, "Build Pulsar docker image" fails sporadically:

[INFO] Building jar: /home/runner/work/pulsar/pulsar/pulsar-io/kafka-connect-adaptor-nar/target/pulsar-io-kafka-connect-adaptor-4.1.0-SNAPSHOT.nar
Warning: [748.365s][warning][gc,alloc] pool-249-thread-4: Retried waiting for GCLocker too often allocating 2500002 words
...
Error:  Failed to execute goal org.apache.nifi:nifi-nar-maven-plugin:1.5.0:nar (default-nar) on project pulsar-io-kafka-connect-adaptor-nar: Error assembling NAR: Problem creating jar: Execution exception: Java heap space -> [Help 1]
Error:  
Error:  To see the full stack trace of the errors, re-run Maven with the -e switch.
Error:  Re-run Maven using the -X switch to enable full debug logging.
Error:  
Error:  For more information about the errors and possible solutions, please read the following articles:
Error:  [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
Error:  
Error:  After correcting the problems, you can resume the build with the command
Error:    mvn <args> -rf :pulsar-io-kafka-connect-adaptor-nar
Error: Process completed with exit code 1.

Additional Context

The NiFi NAR plugin isn't optimal for Pulsar usage since it scans all dependencies for NiFi style documentation.
The excessive heap usage problem would most like be resolved by apache/nifi-maven#35 . However, the NiFi NAR plugin version including the change requires Java 21. One possibility would be to use a Maven profile activated when Java 21 is used to built Pulsar to use the newer version with the possibility to skip NiFI style documentation generation. That is out of scope for this PR.

Modifications

• Increase Maven max heap size to 2048M in Pulsar GitHub Actions CI workflows.
• Add workaround for "Retried waiting for GCLocker too often allocating" issue
  • using solution described in https://tech.clevertap.com/demystifying-g1-gc-gclocker-jni-critical-and-fake-oom-exceptions/
    • -XX:+UnlockDiagnosticVMOptions -XX:GCLockerRetryAllocationCount=100

Documentation

• doc
• doc-required
• doc-not-needed
• doc-complete

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 74.22%. Comparing base (bbc6224) to head (712c36f).
Report is 864 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #23883      +/-   ##
============================================
+ Coverage     73.57%   74.22%   +0.64%     
+ Complexity    32624    31857     -767     
============================================
  Files          1877     1853      -24     
  Lines        139502   143619    +4117     
  Branches      15299    16311    +1012     
============================================
+ Hits         102638   106598    +3960     
+ Misses        28908    28660     -248     
- Partials       7956     8361     +405     

Flag	Coverage Δ
inttests	26.93% <ø> (+2.35%)	⬆️
systests	23.16% <ø> (-1.17%)	⬇️
unittests	73.74% <ø> (+0.90%)	⬆️

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see 1032 files with indirect coverage changes