yihua opened a new pull request, #8732:
URL: https://github.com/apache/hudi/pull/8732
### Change Logs
`ReflectionUtils.hasConstructor` throws warn log if the constructor does not
exist, even in cases where it's expected, e.g., for `DataHubSyncTool` (see
below), confusing users. This PR improves the logging so that by default the
debug-level logs are used.
```
23/05/16 10:58:54 WARN ReflectionUtils: Unable to instantiate class
org.apache.hudi.sync.datahub.DataHubSyncTool
java.lang.NoSuchMethodException:
org.apache.hudi.sync.datahub.DataHubSyncTool.<init>(java.util.Properties,
org.apache.hadoop.conf.Configuration)
at java.lang.Class.getConstructor0(Class.java:3082)
at java.lang.Class.getConstructor(Class.java:1825)
at
org.apache.hudi.common.util.ReflectionUtils.hasConstructor(ReflectionUtils.java:95)
at
org.apache.hudi.sync.common.util.SyncUtilHelpers.instantiateMetaSyncTool(SyncUtilHelpers.java:83)
at
org.apache.hudi.sync.common.util.SyncUtilHelpers.runHoodieMetaSync(SyncUtilHelpers.java:58)
at
org.apache.hudi.utilities.deltastreamer.DeltaSync.runMetaSync(DeltaSync.java:808)
at
org.apache.hudi.utilities.deltastreamer.DeltaSync.writeToSink(DeltaSync.java:723)
at
org.apache.hudi.utilities.deltastreamer.DeltaSync.syncOnce(DeltaSync.java:395)
at
org.apache.hudi.utilities.deltastreamer.HoodieDeltaStreamer.lambda$sync$2(HoodieDeltaStreamer.java:215)
at org.apache.hudi.common.util.Option.ifPresent(Option.java:97)
at
org.apache.hudi.utilities.deltastreamer.HoodieDeltaStreamer.sync(HoodieDeltaStreamer.java:213)
at
org.apache.hudi.utilities.deltastreamer.HoodieDeltaStreamer.main(HoodieDeltaStreamer.java:592)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at
org.apache.spark.deploy.JavaMainApplication.start(SparkApplication.scala:52)
at
org.apache.spark.deploy.SparkSubmit.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:955)
at org.apache.spark.deploy.SparkSubmit.doRunMain$1(SparkSubmit.scala:180)
at org.apache.spark.deploy.SparkSubmit.submit(SparkSubmit.scala:203)
at org.apache.spark.deploy.SparkSubmit.doSubmit(SparkSubmit.scala:90)
at
org.apache.spark.deploy.SparkSubmit$$anon$2.doSubmit(SparkSubmit.scala:1043)
at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:1052)
at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)
```
### Impact
Improves logging to be user-friendly.
### Risk level
none
### Documentation Update
N/A
### Contributor's checklist
- [ ] Read through [contributor's
guide](https://hudi.apache.org/contribute/how-to-contribute)
- [ ] Change Logs and Impact were stated clearly
- [ ] Adequate tests were added if applicable
- [ ] CI passed
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