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From Wei-Chiu Chuang <weic...@cloudera.com>
Subject Re: native snappy library not available: this version of libhadoop was built without snappy support.
Date Tue, 04 Oct 2016 20:05:16 GMT
Hi Uthayan,
what’s the version of Hadoop you have? Hadoop 2.7.3 binary does not ship with snappy precompiled.
If this is the version you have you may have to rebuild Hadoop yourself to include it.

Wei-Chiu Chuang

> On Oct 4, 2016, at 12:59 PM, Uthayan Suthakar <uthayan.suthakar@gmail.com> wrote:
> 
> Hello guys,
> 
> I have a job that reads compressed (Snappy) data but when I run the job, it is throwing
an error "native snappy library not available: this version of libhadoop was built without
snappy support".
> .  
> I followed this instruction but it did not resolve the issue:
> https://community.hortonworks.com/questions/18903/this-version-of-libhadoop-was-built-without-snappy.html
<https://community.hortonworks.com/questions/18903/this-version-of-libhadoop-was-built-without-snappy.html>
> 
> The check native command show that snappy is installed.
> hadoop checknative
> 16/10/04 21:01:30 INFO bzip2.Bzip2Factory: Successfully loaded & initialized native-bzip2
library system-native
> 16/10/04 21:01:30 INFO zlib.ZlibFactory: Successfully loaded & initialized native-zlib
library
> Native library checking:
> hadoop:  true /usr/lib/hadoop/lib/native/libhadoop.so.1.0.0
> zlib:    true /lib64/libz.so.1
> snappy:  true /usr/lib/hadoop/lib/native/libsnappy.so.1
> lz4:     true revision:99
> bzip2:   true /lib64/libbz2.so.1
> openssl: true /usr/lib64/libcrypto.so
> 
> I also have a code in the job to check whether native snappy is loaded, which is returning
true.
> 
> Now, I have no idea why I'm getting this error. Also, I had no issue reading Snappy data
using MapReduce job on the same cluster, Could anyone tell me what is wrong?
> 
> 
> 
> Thank you.
> 
> Stack:
> 
> 
> java.lang.RuntimeException: native snappy library not available: this version of libhadoop
was built without snappy support.
>         at org.apache.hadoop.io.compress.SnappyCodec.checkNativeCodeLoaded(SnappyCodec.java:65)
>         at org.apache.hadoop.io.compress.SnappyCodec.getDecompressorType(SnappyCodec.java:193)
>         at org.apache.hadoop.io.compress.CodecPool.getDecompressor(CodecPool.java:178)
>         at org.apache.hadoop.mapred.LineRecordReader.<init>(LineRecordReader.java:111)
>         at org.apache.hadoop.mapred.TextInputFormat.getRecordReader(TextInputFormat.java:67)
>         at org.apache.spark.rdd.HadoopRDD$$anon$1.<init>(HadoopRDD.scala:237)
>         at org.apache.spark.rdd.HadoopRDD.compute(HadoopRDD.scala:208)
>         at org.apache.spark.rdd.HadoopRDD.compute(HadoopRDD.scala:101)
>         at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:306)
>         at org.apache.spark.rdd.RDD.iterator(RDD.scala:270)
>         at org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:38)
>         at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:306)
>         at org.apache.spark.rdd.RDD.iterator(RDD.scala:270)
>         at org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:38)
>         at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:306)
>         at org.apache.spark.rdd.RDD.iterator(RDD.scala:270)
>         at org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:38)
>         at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:306)
>         at org.apache.spark.rdd.RDD.iterator(RDD.scala:270)
>         at org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:73)
>         at org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:41)
>         at org.apache.spark.scheduler.Task.run(Task.scala:89)
>         at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:214)
>         at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>         at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>         at java.lang.Thread.run(Thread.java:745)


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