[improve] [broker] Print warn log if compaction failure

[poorbarcode]

Motivation

Now exceptions that happen in the flow of compaction task are collected into variable currentCompaction and don't print any log.

When compaction doesn't work, two reasons come to mind:

• the task skipped by rules.
• the task failed.

We can't determine which causing the problem if there has no log, this increases the difficulty of troubleshooting.

The API pulsar-admin topics compaction-status <topic> lets us see what happens when the last compaction executes, But it can not help us know if there were previous missions that failed.

Modifications

Print warn log if compaction fails.

Documentation

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

Matching PR in forked repository

PR in forked repository:

• [ci] [improve] [broker] Print warn log if compaction failure poorbarcode/pulsar#63

[poorbarcode]

/pulsarbot rerun-failure-checks

[codecov-commenter]

Codecov Report

Merging #19405 (6cb2ff6) into master (39dd1cd) will increase coverage by 30.22%.
The diff coverage is 76.31%.

@@              Coverage Diff              @@
##             master   #19405       +/-   ##
=============================================
+ Coverage     32.36%   62.59%   +30.22%     
- Complexity     6355    25663    +19308     
=============================================
  Files          1648     1830      +182     
  Lines        123990   133944     +9954     
  Branches      13523    14737     +1214     
=============================================
+ Hits          40129    83838    +43709     
+ Misses        77958    42381    -35577     
- Partials       5903     7725     +1822     

Flag	Coverage Δ
inttests	24.88% <71.05%> (+0.07%)	⬆️
systests	25.58% <18.42%> (-0.11%)	⬇️
unittests	59.78% <42.10%> (+42.24%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...va/org/apache/pulsar/broker/service/ServerCnx.java	54.24% <53.84%> (+17.13%)	⬆️
.../org/apache/pulsar/broker/admin/AdminResource.java	74.93% <87.50%> (+31.90%)	⬆️
...sar/broker/service/persistent/PersistentTopic.java	64.30% <100.00%> (+13.02%)	⬆️
...ker/loadbalance/impl/LeastLongTermMessageRate.java	73.33% <0.00%> (-11.12%)	⬇️
...r/service/AbstractDispatcherMultipleConsumers.java	70.96% <0.00%> (-9.68%)	⬇️
...r/service/schema/DefaultSchemaRegistryService.java	0.00% <0.00%> (-6.25%)	⬇️
...in/java/org/apache/pulsar/PulsarBrokerStarter.java	28.14% <0.00%> (-3.00%)	⬇️
.../apache/pulsar/broker/loadbalance/LoadManager.java	58.33% <0.00%> (-2.78%)	⬇️
.../apache/pulsar/client/impl/ClientCnxIdleState.java	68.88% <0.00%> (-2.23%)	⬇️
...xtensions/channel/ServiceUnitStateChannelImpl.java	0.96% <0.00%> (-0.01%)	⬇️
... and 1224 more