Revert "Expose some monitor metrics (#106)"

[nlu90]

This reverts commit d7d955c.

(If this PR fixes a github issue, please add Fixes #<xyz>.)

Fixes #

(or if this PR is one task of a github issue, please add Master Issue: #<xyz> to link to the master issue.)

Master Issue: #

Motivation

The metrics reporting code has issues during runtime.
Revert these changes temporarily until we finish the admin dependency cleanup.

23/03/28 16:06:30 INFO PulsarSource: GetBatch generating RDD of offset range: org.apache.spark.sql.pulsar.PulsarOffsetRange@1e815163
23/03/28 16:06:30 INFO MetricsSystem: Metrics already registered
java.lang.IllegalArgumentException: A metric named app-20230328160550-0003.driver.pulsar.spark-pulsar-5dcf5828-6c8c-4654-962c-21e5a630e141.msgRateOut already exists
	at com.codahale.metrics.MetricRegistry.register(MetricRegistry.java:156)
	at com.codahale.metrics.MetricRegistry$1.onGaugeAdded(MetricRegistry.java:101)
	at com.codahale.metrics.MetricRegistry.notifyListenerOfAddedMetric(MetricRegistry.java:540)
	at com.codahale.metrics.MetricRegistry.addListener(MetricRegistry.java:381)
	at com.codahale.metrics.MetricRegistry.register(MetricRegistry.java:98)
	at org.apache.spark.metrics.MetricsSystem.registerSource(MetricsSystem.scala:165)
	at org.apache.spark.sql.pulsar.PulsarSource.getBatch(PulsarSource.scala:160)
	at org.apache.spark.sql.execution.streaming.MicroBatchExecution.$anonfun$runBatch$3(MicroBatchExecution.scala:496)
	at scala.collection.TraversableLike.$anonfun$flatMap$1(TraversableLike.scala:293)
	at scala.collection.Iterator.foreach(Iterator.scala:943)
	at scala.collection.Iterator.foreach$(Iterator.scala:943)
	at scala.collection.AbstractIterator.foreach(Iterator.scala:1431)
	at scala.collection.IterableLike.foreach(IterableLike.scala:74)
	at scala.collection.IterableLike.foreach$(IterableLike.scala:73)
	at org.apache.spark.sql.execution.streaming.StreamProgress.foreach(StreamProgress.scala:27)
	at scala.collection.TraversableLike.flatMap(TraversableLike.scala:293)
	at scala.collection.TraversableLike.flatMap$(TraversableLike.scala:290)
	at org.apache.spark.sql.execution.streaming.StreamProgress.flatMap(StreamProgress.scala:27)
	at org.apache.spark.sql.execution.streaming.MicroBatchExecution.$anonfun$runBatch$2(MicroBatchExecution.scala:492)
	at org.apache.spark.sql.execution.streaming.ProgressReporter.reportTimeTaken(ProgressReporter.scala:375)
	at org.apache.spark.sql.execution.streaming.ProgressReporter.reportTimeTaken$(ProgressReporter.scala:373)
	at org.apache.spark.sql.execution.streaming.StreamExecution.reportTimeTaken(StreamExecution.scala:69)
	at org.apache.spark.sql.execution.streaming.MicroBatchExecution.runBatch(MicroBatchExecution.scala:492)
	at org.apache.spark.sql.execution.streaming.MicroBatchExecution.$anonfun$runActivatedStream$2(MicroBatchExecution.scala:228)
	at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
	at org.apache.spark.sql.execution.streaming.ProgressReporter.reportTimeTaken(ProgressReporter.scala:375)
	at org.apache.spark.sql.execution.streaming.ProgressReporter.reportTimeTaken$(ProgressReporter.scala:373)
	at org.apache.spark.sql.execution.streaming.StreamExecution.reportTimeTaken(StreamExecution.scala:69)
	at org.apache.spark.sql.execution.streaming.MicroBatchExecution.$anonfun$runActivatedStream$1(MicroBatchExecution.scala:193)
	at org.apache.spark.sql.execution.streaming.ProcessingTimeExecutor.execute(TriggerExecutor.scala:57)
	at org.apache.spark.sql.execution.streaming.MicroBatchExecution.runActivatedStream(MicroBatchExecution.scala:187)
	at org.apache.spark.sql.execution.streaming.StreamExecution.$anonfun$runStream$1(StreamExecution.scala:303)
	at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
	at org.apache.spark.sql.SparkSession.withActive(SparkSession.scala:775)
	at org.apache.spark.sql.execution.streaming.StreamExecution.org$apache$spark$sql$execution$streaming$StreamExecution$$runStream(StreamExecution.scala:286)
	at org.apache.spark.sql.execution.streaming.StreamExecution$$anon$1.run(StreamExecution.scala:209)

Modifications

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Verifying this change

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This change is a trivial rework / code cleanup without any test coverage.

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This change is already covered by existing tests, such as (please describe tests).

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This change added tests and can be verified as follows:

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• Added integration tests for end-to-end deployment with large payloads (10MB)
• Extended integration test for recovery after broker failure

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