Dave Hagman created HUDI-2230:
---------------------------------
Summary: "Task not serializable" exception due to non-serializable
Codahale Timers
Key: HUDI-2230
URL: https://issues.apache.org/jira/browse/HUDI-2230
Project: Apache Hudi
Issue Type: Bug
Components: metrics
Affects Versions: 0.9.0
Reporter: Dave Hagman
Fix For: 0.9.0
Steps to reproduce:
* Enable graphite metrics via props file. Example:
```
hoodie.metrics.on=true
hoodie.metrics.reporter.type=GRAPHITE
hoodie.metrics.graphite.host=<host>
hoodie.metrics.graphite.port=<port>
hoodie.metrics.graphite.metric.prefix=<metrics_prefix>
```
* Run the Deltastreamer
* Note the following exception:
```
Exception in thread "main" org.apache.hudi.exception.HoodieException:
org.apache.hudi.exception.HoodieException: Task not serializable
at
org.apache.hudi.utilities.deltastreamer.HoodieDeltaStreamer.lambda$sync$1(HoodieDeltaStreamer.java:165)
at org.apache.hudi.common.util.Option.ifPresent(Option.java:96)
at
org.apache.hudi.utilities.deltastreamer.HoodieDeltaStreamer.sync(HoodieDeltaStreamer.java:160)
at
org.apache.hudi.utilities.deltastreamer.HoodieDeltaStreamer.main(HoodieDeltaStreamer.java:501)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at
org.apache.spark.deploy.JavaMainApplication.start(SparkApplication.scala:52)
at
org.apache.spark.deploy.SparkSubmit.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:959)
at
org.apache.spark.deploy.SparkSubmit.doRunMain$1(SparkSubmit.scala:180)
at org.apache.spark.deploy.SparkSubmit.submit(SparkSubmit.scala:203)
at org.apache.spark.deploy.SparkSubmit.doSubmit(SparkSubmit.scala:90)
at
org.apache.spark.deploy.SparkSubmit$$anon$2.doSubmit(SparkSubmit.scala:1038)
at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:1047)
at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)
Caused by: java.util.concurrent.ExecutionException:
org.apache.hudi.exception.HoodieException: Task not serializable
at
java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:357)
at
java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1908)
at
org.apache.hudi.async.HoodieAsyncService.waitForShutdown(HoodieAsyncService.java:90)
at
org.apache.hudi.utilities.deltastreamer.HoodieDeltaStreamer.lambda$sync$1(HoodieDeltaStreamer.java:163)
... 15 more
Caused by: org.apache.hudi.exception.HoodieException: Task not serializable
at
org.apache.hudi.utilities.deltastreamer.HoodieDeltaStreamer$DeltaSyncService.lambda$startService$0(HoodieDeltaStreamer.java:649)
at
java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1604)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: org.apache.spark.SparkException: Task not serializable
at
org.apache.spark.util.ClosureCleaner$.ensureSerializable(ClosureCleaner.scala:416)
at org.apache.spark.util.ClosureCleaner$.clean(ClosureCleaner.scala:406)
at org.apache.spark.util.ClosureCleaner$.clean(ClosureCleaner.scala:162)
at org.apache.spark.SparkContext.clean(SparkContext.scala:2502)
at org.apache.spark.rdd.RDD.$anonfun$map$1(RDD.scala:422)
at
org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:151)
at
org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:112)
at org.apache.spark.rdd.RDD.withScope(RDD.scala:414)
at org.apache.spark.rdd.RDD.map(RDD.scala:421)
at org.apache.spark.api.java.JavaRDDLike.map(JavaRDDLike.scala:93)
at org.apache.spark.api.java.JavaRDDLike.map$(JavaRDDLike.scala:92)
at
org.apache.spark.api.java.AbstractJavaRDDLike.map(JavaRDDLike.scala:45)
...
at
org.apache.hudi.utilities.sources.RowSource.fetchNewData(RowSource.java:43)
at org.apache.hudi.utilities.sources.Source.fetchNext(Source.java:76)
at
org.apache.hudi.utilities.deltastreamer.SourceFormatAdapter.fetchNewDataInAvroFormat(SourceFormatAdapter.java:69)
at
org.apache.hudi.utilities.deltastreamer.DeltaSync.readFromSource(DeltaSync.java:399)
at
org.apache.hudi.utilities.deltastreamer.DeltaSync.syncOnce(DeltaSync.java:271)
at
org.apache.hudi.utilities.deltastreamer.HoodieDeltaStreamer$DeltaSyncService.lambda$startService$0(HoodieDeltaStreamer.java:625)
... 4 more
Caused by: java.io.NotSerializableException:
org.apache.hudi.com.codahale.metrics.Timer
Serialization stack:
- object not serializable (class:
org.apache.hudi.com.codahale.metrics.Timer, value:
org.apache.hudi.com.codahale.metrics.Timer@e7bcb5c)
- field (class:
org.apache.hudi.utilities.deltastreamer.HoodieDeltaStreamerMetrics, name:
overallTimer, type: class org.apache.hudi.com.codahale.metrics.Timer)
- object (class
org.apache.hudi.utilities.deltastreamer.HoodieDeltaStreamerMetrics,
org.apache.hudi.utilities.deltastreamer.HoodieDeltaStreamerMetrics@6704c405)
...
- element of array (index: 0)
- array (class [Ljava.lang.Object;, size 1)
- field (class: java.lang.invoke.SerializedLambda, name: capturedArgs,
type: class [Ljava.lang.Object;)
- object (class java.lang.invoke.SerializedLambda,
SerializedLambda[capturingClass=...,
functionalInterfaceMethod=org/apache/spark/api/java/function/Function.call:
```
The important line being:
```
- field (class:
org.apache.hudi.utilities.deltastreamer.HoodieDeltaStreamerMetrics, name:
overallTimer, type: class org.apache.hudi.com.codahale.metrics.Timer)
```
__FIX:__
Make the `Timer` member variables in the `HoodieDeltaStreamerMetrics` class
transient so that they are not serialized over the wire.
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