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From "Hyukjin Kwon (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (SPARK-26019) pyspark/accumulators.py: "TypeError: object of type 'NoneType' has no len()" in authenticate_and_accum_updates()
Date Tue, 20 Nov 2018 00:52:00 GMT

     [ https://issues.apache.org/jira/browse/SPARK-26019?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Hyukjin Kwon resolved SPARK-26019.
----------------------------------
    Resolution: Cannot Reproduce

> pyspark/accumulators.py: "TypeError: object of type 'NoneType' has no len()" in authenticate_and_accum_updates()
> ----------------------------------------------------------------------------------------------------------------
>
>                 Key: SPARK-26019
>                 URL: https://issues.apache.org/jira/browse/SPARK-26019
>             Project: Spark
>          Issue Type: Bug
>          Components: PySpark
>    Affects Versions: 2.3.2, 2.4.0
>            Reporter: Ruslan Dautkhanov
>            Priority: Major
>
> Started happening after 2.3.1 -> 2.3.2 upgrade.
>  
> {code:python}
> Exception happened during processing of request from ('127.0.0.1', 43418)
> ----------------------------------------
> Traceback (most recent call last):
>   File "/opt/cloudera/parcels/Anaconda/lib/python2.7/SocketServer.py", line 290, in
_handle_request_noblock
>     self.process_request(request, client_address)
>   File "/opt/cloudera/parcels/Anaconda/lib/python2.7/SocketServer.py", line 318, in
process_request
>     self.finish_request(request, client_address)
>   File "/opt/cloudera/parcels/Anaconda/lib/python2.7/SocketServer.py", line 331, in
finish_request
>     self.RequestHandlerClass(request, client_address, self)
>   File "/opt/cloudera/parcels/Anaconda/lib/python2.7/SocketServer.py", line 652, in
__init__
>     self.handle()
>   File "/opt/cloudera/parcels/SPARK2-2.3.0.cloudera4-1.cdh5.13.3.p0.611179/lib/spark2/python/lib/pyspark.zip/pyspark/accumulators.py",
line 263, in handle
>     poll(authenticate_and_accum_updates)
>   File "/opt/cloudera/parcels/SPARK2-2.3.0.cloudera4-1.cdh5.13.3.p0.611179/lib/spark2/python/lib/pyspark.zip/pyspark/accumulators.py",
line 238, in poll
>     if func():
>   File "/opt/cloudera/parcels/SPARK2-2.3.0.cloudera4-1.cdh5.13.3.p0.611179/lib/spark2/python/lib/pyspark.zip/pyspark/accumulators.py",
line 251, in authenticate_and_accum_updates
>     received_token = self.rfile.read(len(auth_token))
> TypeError: object of type 'NoneType' has no len()
>  
> {code}
>  
> Error happens here:
> https://github.com/apache/spark/blob/cb90617f894fd51a092710271823ec7d1cd3a668/python/pyspark/accumulators.py#L254
> The PySpark code was just running a simple pipeline of 
> binary_rdd = sc.binaryRecords(full_file_path, record_length).map(lambda .. )
> and then converting it to a dataframe and running a count on it.
> It seems error is flaky - on next rerun it didn't happen.



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