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  1. SW-1107

NullPointerException at water.H2ONode.openChan(H2ONode.java:417) after upgrade to H2O 3.22.0.3

    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Critical
    • Resolution: Fixed
    • Affects Version/s: 2.3.19
    • Fix Version/s: 2.1.45, 2.2.31, 2.3.20, 2.4.2
    • Component/s: None
    • Labels:
      None
    • CustomerVisible:
      Yes
    • Sprint:

      Description

      NPE happens here
      https://github.com/h2oai/h2o-3/blob/02b183e7d6d7c83301486ca2fd0ce15b61294379/h2o-core/src/main/java/water/H2ONode.java#L417

      when calling
      hc.as_h2o_frame() (from Sparkling Water 2.3.19, connected to h2o external backend cluster).

      Same code worked fine before upgrade (from SW 2.3.13).

      See full exception here -

      
      Py4JJavaErrorTraceback (most recent call last)
      <ipython-input-52-9806e38ce736> in <module>()
           79     print datetime.now().strftime('%Y%m%d %H:%M:%S') + "-Converting to H2O Frame..."
           80 
      ---> 81     modeling = hc.as_h2o_frame(modeling_data,framename=hdfs_file_name)
           82     print datetime.now().strftime('%Y%m%d %H:%M:%S') + "-Complete"
           83 
      
      /opt/cloudera/parcels/Anaconda/lib/python2.7/site-packages/pysparkling/context.pyc in as_h2o_frame(self, dataframe, framename, full_cols)
          253         """
          254         if isinstance(dataframe, DataFrame):
      --> 255             return fc._as_h2o_frame_from_dataframe(self, dataframe, framename, full_cols)
          256         elif isinstance(dataframe, RDD) and dataframe.isEmpty():
          257             schema = StructType([])
      
      /opt/cloudera/parcels/Anaconda/lib/python2.7/site-packages/pysparkling/conversions.pyc in _as_h2o_frame_from_dataframe(h2oContext, dataframe, frame_name, full_cols)
           40     @staticmethod
           41     def _as_h2o_frame_from_dataframe(h2oContext, dataframe, frame_name, full_cols=100):
      ---> 42         j_h2o_frame = h2oContext._jhc.asH2OFrame(dataframe._jdf, frame_name)
           43         j_h2o_frame_key = j_h2o_frame.key()
           44         return H2OFrame.from_java_h2o_frame(j_h2o_frame,j_h2o_frame_key, full_cols)
      
      /opt/cloudera/parcels/SPARK2-2.3.0.cloudera4-1.cdh5.13.3.p0.611179/lib/spark2/python/lib/py4j-0.10.7-src.zip/py4j/java_gateway.py in __call__(self, *args)
         1255         answer = self.gateway_client.send_command(command)
         1256         return_value = get_return_value(
      -> 1257             answer, self.gateway_client, self.target_id, self.name)
         1258 
         1259         for temp_arg in temp_args:
      
      /opt/cloudera/parcels/SPARK2-2.3.0.cloudera4-1.cdh5.13.3.p0.611179/lib/spark2/python/lib/pyspark.zip/pyspark/sql/utils.py in deco(*a, **kw)
           61     def deco(*a, **kw):
           62         try:
      ---> 63             return f(*a, **kw)
           64         except py4j.protocol.Py4JJavaError as e:
           65             s = e.java_exception.toString()
      
      /opt/cloudera/parcels/SPARK2-2.3.0.cloudera4-1.cdh5.13.3.p0.611179/lib/spark2/python/lib/py4j-0.10.7-src.zip/py4j/protocol.py in get_return_value(answer, gateway_client, target_id, name)
          326                 raise Py4JJavaError(
          327                     "An error occurred while calling {0}{1}{2}.\n".
      --> 328                     format(target_id, ".", name), value)
          329             else:
          330                 raise Py4JError(
      
      Py4JJavaError: An error occurred while calling o605.asH2OFrame.
      : org.apache.spark.SparkException: Job aborted due to stage failure: Task 2 in stage 85.0 failed 4 times, most recent failure: Lost task 2.3 in stage 85.0 (TID 12836, pc1udatahad15.abacus-us.com, executor 24): java.lang.NullPointerException
                    at water.H2ONode.openChan(H2ONode.java:417)
                    at water.H2ONode.openChan(H2ONode.java:428)
                    at water.ExternalFrameUtils.getConnection(ExternalFrameUtils.java:50)
                    at org.apache.spark.h2o.backends.external.ExternalWriteConverterCtx.<init>(ExternalWriteConverterCtx.scala:31)
                    at org.apache.spark.h2o.converters.WriteConverterCtxUtils$$anonfun$create$1.apply(WriteConverterCtxUtils.scala:42)
                    at org.apache.spark.h2o.converters.WriteConverterCtxUtils$$anonfun$create$1.apply(WriteConverterCtxUtils.scala:42)
                    at scala.Option.map(Option.scala:146)
                    at org.apache.spark.h2o.converters.WriteConverterCtxUtils$.create(WriteConverterCtxUtils.scala:42)
                    at org.apache.spark.h2o.converters.SparkDataFrameConverter$.org$apache$spark$h2o$converters$SparkDataFrameConverter$$perSQLPartition(SparkDataFrameConverter.scala:102)
                    at org.apache.spark.h2o.converters.SparkDataFrameConverter$$anonfun$toH2OFrame$2$$anonfun$apply$1.apply(SparkDataFrameConverter.scala:82)
                    at org.apache.spark.h2o.converters.SparkDataFrameConverter$$anonfun$toH2OFrame$2$$anonfun$apply$1.apply(SparkDataFrameConverter.scala:82)
                    at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:87)
                    at org.apache.spark.scheduler.Task.run(Task.scala:109)
                    at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:381)
                    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)
      
      Driver stacktrace:
                    at org.apache.spark.scheduler.DAGScheduler.org$apache$spark$scheduler$DAGScheduler$$failJobAndIndependentStages(DAGScheduler.scala:1651)
                    at org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:1639)
                    at org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:1638)
                    at scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59)
                    at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:48)
                    at org.apache.spark.scheduler.DAGScheduler.abortStage(DAGScheduler.scala:1638)
                    at org.apache.spark.scheduler.DAGScheduler$$anonfun$handleTaskSetFailed$1.apply(DAGScheduler.scala:831)
                    at org.apache.spark.scheduler.DAGScheduler$$anonfun$handleTaskSetFailed$1.apply(DAGScheduler.scala:831)
                    at scala.Option.foreach(Option.scala:257)
                    at org.apache.spark.scheduler.DAGScheduler.handleTaskSetFailed(DAGScheduler.scala:831)
                    at org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.doOnReceive(DAGScheduler.scala:1872)
                    at org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.onReceive(DAGScheduler.scala:1821)
                    at org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.onReceive(DAGScheduler.scala:1810)
                    at org.apache.spark.util.EventLoop$$anon$1.run(EventLoop.scala:48)
                    at org.apache.spark.scheduler.DAGScheduler.runJob(DAGScheduler.scala:642)
                    at org.apache.spark.SparkContext.runJob(SparkContext.scala:2034)
                    at org.apache.spark.SparkContext.runJob(SparkContext.scala:2055)
                    at org.apache.spark.SparkContext.runJob(SparkContext.scala:2087)
                    at org.apache.spark.h2o.converters.WriteConverterCtxUtils$.convert(WriteConverterCtxUtils.scala:87)
                    at org.apache.spark.h2o.converters.SparkDataFrameConverter$.toH2OFrame(SparkDataFrameConverter.scala:81)
                    at org.apache.spark.h2o.H2OContext$$anonfun$asH2OFrame$2.apply(H2OContext.scala:222)
                    at org.apache.spark.h2o.H2OContext$$anonfun$asH2OFrame$2.apply(H2OContext.scala:222)
                    at org.apache.spark.h2o.utils.H2OContextUtils$class.withConversionDebugPrints(H2OContextUtils.scala:91)
                    at org.apache.spark.h2o.H2OContext.withConversionDebugPrints(H2OContext.scala:66)
                    at org.apache.spark.h2o.H2OContext.asH2OFrame(H2OContext.scala:222)
                    at org.apache.spark.h2o.H2OContext.asH2OFrame(H2OContext.scala:224)
                    at org.apache.spark.h2o.JavaH2OContext.asH2OFrame(JavaH2OContext.java:103)
                    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.zeppelin.py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:231)
                    at org.apache.zeppelin.py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:381)
                    at org.apache.zeppelin.py4j.Gateway.invoke(Gateway.java:290)
                    at org.apache.zeppelin.py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:133)
                    at org.apache.zeppelin.py4j.commands.CallCommand.execute(CallCommand.java:79)
                    at org.apache.zeppelin.py4j.GatewayConnection.run(GatewayConnection.java:209)
                    at java.lang.Thread.run(Thread.java:748)
      Caused by: java.lang.NullPointerException
                    at water.H2ONode.openChan(H2ONode.java:417)
                    at water.H2ONode.openChan(H2ONode.java:428)
                    at water.ExternalFrameUtils.getConnection(ExternalFrameUtils.java:50)
                    at org.apache.spark.h2o.backends.external.ExternalWriteConverterCtx.<init>(ExternalWriteConverterCtx.scala:31)
                    at org.apache.spark.h2o.converters.WriteConverterCtxUtils$$anonfun$create$1.apply(WriteConverterCtxUtils.scala:42)
                    at org.apache.spark.h2o.converters.WriteConverterCtxUtils$$anonfun$create$1.apply(WriteConverterCtxUtils.scala:42)
                    at scala.Option.map(Option.scala:146)
                    at org.apache.spark.h2o.converters.WriteConverterCtxUtils$.create(WriteConverterCtxUtils.scala:42)
                    at org.apache.spark.h2o.converters.SparkDataFrameConverter$.org$apache$spark$h2o$converters$SparkDataFrameConverter$$perSQLPartition(SparkDataFrameConverter.scala:102)
                    at org.apache.spark.h2o.converters.SparkDataFrameConverter$$anonfun$toH2OFrame$2$$anonfun$apply$1.apply(SparkDataFrameConverter.scala:82)
                    at org.apache.spark.h2o.converters.SparkDataFrameConverter$$anonfun$toH2OFrame$2$$anonfun$apply$1.apply(SparkDataFrameConverter.scala:82)
                    at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:87)
                    at org.apache.spark.scheduler.Task.run(Task.scala:109)
                    at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:381)
                    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
                    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
                    ... 1 more
      
      

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            • Assignee:
              Kuba Jakub Hava
              Reporter:
              tagar Ruslan Dautkhanov
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              Dates

              • Created:
                Updated:
                Resolved: