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From Nicholas Chammas <nicholas.cham...@gmail.com>
Subject Re: count()-ing gz files gives java.io.IOException: incorrect header check
Date Thu, 22 May 2014 03:50:51 GMT
Thanks for the suggestions, people. I will try to hone in on which specific
gzipped files, if any, are actually corrupt.

Michael,

I’m using Hadoop 1.0.4, which I believe is the default version that gets
deployed by spark-ec2. The JIRA issue I linked to earlier,
HADOOP-5281<https://issues.apache.org/jira/browse/HADOOP-5281>,
affects Hadoop 0.18.0 and is fixed in 0.20.0 and is also related to gzip
compression. I know there is some funkiness in how Hadoop is versioned, so
I’m not sure if this issue is relevant to 1.0.4.

Were you able to resolve your issue by changing your version of Hadoop? How
did you do that?

Nick
​


On Wed, May 21, 2014 at 11:38 PM, Andrew Ash <andrew@andrewash.com> wrote:

> One thing you can try is to pull each file out of S3 and decompress with
> "gzip -d" to see if it works.  I'm guessing there's a corrupted .gz file
> somewhere in your path glob.
>
> Andrew
>
>
> On Wed, May 21, 2014 at 12:40 PM, Michael Cutler <michael@tumra.com>wrote:
>
>> Hi Nick,
>>
>> Which version of Hadoop are you using with Spark?  I spotted an issue
>> with the built-in GzipDecompressor while doing something similar with
>> Hadoop 1.0.4, all my Gzip files were valid and tested yet certain files
>> blew up from Hadoop/Spark.
>>
>> The following JIRA ticket goes into more detail
>> https://issues.apache.org/jira/browse/HADOOP-8900 and it affects all
>> Hadoop releases prior to 1.2.X
>>
>> MC
>>
>>
>>
>>
>>  *Michael Cutler*
>> Founder, CTO
>>
>>
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>> On 21 May 2014 14:26, Madhu <madhu@madhu.com> wrote:
>>
>>> Can you identify a specific file that fails?
>>> There might be a real bug here, but I have found gzip to be reliable.
>>> Every time I have run into a "bad header" error with gzip, I had a
>>> non-gzip
>>> file with the wrong extension for whatever reason.
>>>
>>>
>>>
>>>
>>> -----
>>> Madhu
>>> https://www.linkedin.com/in/msiddalingaiah
>>> --
>>> View this message in context:
>>> http://apache-spark-user-list.1001560.n3.nabble.com/count-ing-gz-files-gives-java-io-IOException-incorrect-header-check-tp5768p6169.html
>>> Sent from the Apache Spark User List mailing list archive at Nabble.com.
>>>
>>
>>
>

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