wankunde opened a new pull request #533: [GRIFFIN-288]optimize hdfs sink URL: https://github.com/apache/griffin/pull/533 When we sink records to hdfs , it may be OOM if the result is huge. ``` 19/09/06 18:52:39 INFO LineBufferedStream: 19/09/06 18:52:39 ERROR sink.HdfsSink: Java heap space 19/09/06 18:52:39 INFO LineBufferedStream: java.lang.OutOfMemoryError: Java heap space 19/09/06 18:52:39 INFO LineBufferedStream: at java.util.Arrays.copyOf(Arrays.java:3332) 19/09/06 18:52:39 INFO LineBufferedStream: at java.lang.AbstractStringBuilder.ensureCapacityInternal(AbstractStringBuilder.java:124) 19/09/06 18:52:39 INFO LineBufferedStream: at java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:448) 19/09/06 18:52:39 INFO LineBufferedStream: at java.lang.StringBuilder.append(StringBuilder.java:136) 19/09/06 18:52:39 INFO LineBufferedStream: at scala.collection.mutable.StringBuilder.append(StringBuilder.scala:200) 19/09/06 18:52:39 INFO LineBufferedStream: at scala.collection.TraversableOnce$$anonfun$addString$1.apply(TraversableOnce.scala:364) 19/09/06 18:52:39 INFO LineBufferedStream: at scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33) 19/09/06 18:52:39 INFO LineBufferedStream: at scala.collection.mutable.WrappedArray.foreach(WrappedArray.scala:35) 19/09/06 18:52:39 INFO LineBufferedStream: at scala.collection.TraversableOnce$class.addString(TraversableOnce.scala:357) 19/09/06 18:52:39 INFO LineBufferedStream: at scala.collection.AbstractTraversable.addString(Traversable.scala:104) 19/09/06 18:52:39 INFO LineBufferedStream: at scala.collection.TraversableOnce$class.mkString(TraversableOnce.scala:323) 19/09/06 18:52:39 INFO LineBufferedStream: at scala.collection.AbstractTraversable.mkString(Traversable.scala:104) 19/09/06 18:52:39 INFO LineBufferedStream: at scala.collection.TraversableOnce$class.mkString(TraversableOnce.scala:325) 19/09/06 18:52:39 INFO LineBufferedStream: at scala.collection.AbstractTraversable.mkString(Traversable.scala:104) 19/09/06 18:52:39 INFO LineBufferedStream: at org.apache.griffin.measure.sink.HdfsSink.org$apache$griffin$measure$sink$HdfsSink$$sinkRecords2Hdfs(HdfsSink.scala:191) 19/09/06 18:52:39 INFO LineBufferedStream: at org.apache.griffin.measure.sink.HdfsSink.sinkRecords(HdfsSink.scala:133) 19/09/06 18:52:39 INFO LineBufferedStream: at org.apache.griffin.measure.sink.MultiSinks$$anonfun$sinkRecords$1.apply(MultiSinks.scala:63) 19/09/06 18:52:39 INFO LineBufferedStream: at org.apache.griffin.measure.sink.MultiSinks$$anonfun$sinkRecords$1.apply(MultiSinks.scala:61) 19/09/06 18:52:39 INFO LineBufferedStream: at scala.collection.immutable.List.foreach(List.scala:392) 19/09/06 18:52:39 INFO LineBufferedStream: at org.apache.griffin.measure.sink.MultiSinks.sinkRecords(MultiSinks.scala:61) 19/09/06 18:52:39 INFO LineBufferedStream: at org.apache.griffin.measure.step.write.RecordWriteStep.execute(RecordWriteStep.scala:49) 19/09/06 18:52:39 INFO LineBufferedStream: at org.apache.griffin.measure.step.transform.SparkSqlTransformStep.doExecute(SparkSqlTransformStep.scala:40) 19/09/06 18:52:39 INFO LineBufferedStream: at org.apache.griffin.measure.step.transform.TransformStep$class.execute(TransformStep.scala:72) 19/09/06 18:52:39 INFO LineBufferedStream: at org.apache.griffin.measure.step.transform.SparkSqlTransformStep.execute(SparkSqlTransformStep.scala:27) 19/09/06 18:52:39 INFO LineBufferedStream: at org.apache.griffin.measure.step.transform.TransformStep$$anonfun$2$$anonfun$apply$1.apply$mcV$sp(TransformStep.scala:51) 19/09/06 18:52:39 INFO LineBufferedStream: at org.apache.griffin.measure.step.transform.TransformStep$$anonfun$2$$anonfun$apply$1.apply(TransformStep.scala:50) 19/09/06 18:52:39 INFO LineBufferedStream: at org.apache.griffin.measure.step.transform.TransformStep$$anonfun$2$$anonfun$apply$1.apply(TransformStep.scala:50) 19/09/06 18:52:39 INFO LineBufferedStream: at scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24) 19/09/06 18:52:39 INFO LineBufferedStream: at scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24) 19/09/06 18:52:39 INFO LineBufferedStream: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) 19/09/06 18:52:39 INFO LineBufferedStream: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 19/09/06 18:52:39 INFO LineBufferedStream: at java.lang.Thread.run(Thread.java:748) ```
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