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I am running Hadoop 2.4.1. I run my jobs through mrjob (if that matters). When I run against an uncompressed file, splits happen and I automatically have more mappers than files. However when I run against *.4mc files no splitting occurs. Running hadoop fs -text file.4mc works so I know it's decompressing okay and running a job against *.4mc files works just no splitting occurs.
One other thing I noticed is that if I use the files with the .lz4_uc extension hadoop fs -text file.lz4_uc using I get the following error:
15/01/23 01:47:58 INFO Configuration.deprecation: hadoop.native.lib is deprecated. Instead, use io.native.lib.available
Exception in thread "main" java.lang.InternalError: LZ4_decompress_safe returned: -2
I am not sure if that's related or not.
The text was updated successfully, but these errors were encountered:
I am running Hadoop 2.4.1. I run my jobs through mrjob (if that matters). When I run against an uncompressed file, splits happen and I automatically have more mappers than files. However when I run against *.4mc files no splitting occurs. Running
hadoop fs -text file.4mc
works so I know it's decompressing okay and running a job against *.4mc files works just no splitting occurs.One other thing I noticed is that if I use the files with the
.lz4_uc
extensionhadoop fs -text file.lz4_uc
using I get the following error:I am not sure if that's related or not.
The text was updated successfully, but these errors were encountered: