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From Jeff Quinn <>
Subject Use of PCollection#materialize on Spark Pipeline
Date Fri, 06 Nov 2015 20:14:22 GMT

Are there any known issues with using PCollection#materialize with
SparkPipeline? I am trying to use it in my pipeline and I am seeing
interesting errors occur sometimes when the materialization is attempted,
such as:

java.lang.IllegalArgumentException: Unknown codec:^@^@^@^@??^V??fi?8?lU?????????^V??fi?8?lU???^A

SeqFileReaderFactory: Could not read seqfile at path:
hdfs://ip-10-0-17-226.ec2.internal:8020/tmp/crunch-300241792/p5/part-r-00001 Invalid size: -2062707543 for file metadata object

This is with Crunch 0.13.0 / Spark 1.5.0. Anyone have any ideas?



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