Hadoop native and snappy library?

Question

I'm trying to enable the Hadoop native library and the snappy library for compression in Hadoop 2.2.0, but I always end up with:

./hadoop/bin/hadoop checknative -a
Native library checking:
hadoop: false
zlib: false
snappy: false
lz4: false
bzip2: false

I compiled hadoop-2.2.0-src from scratch for x64 and put the resulting .so in hadoop/lib/native/. I also compiled snappy from scratch and put it there. In a different approach I installed snappy via sudo apt-get
and then linked the resulting .so to hadoop/lib/native/libsnappy.so, still no luck.

What is going on here? Why won't Hadoop find my native libraries? Is there any log where I can check what went wrong during loading?

Comments

check https://issues.apache.org/jira/browse/HBASE-10303 and  https://hbase.apache.org/book.html#snappy.compression

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Thanks... after looking at the sourcecode of the native library loading process and activating the DEBUG messages I found this in the "hadoop.log":

DEBUG org.apache.hadoop.util.NativeCodeLoader:
Failed to load native-hadoop with error: java.lang.UnsatisfiedLinkError: /hadoop-2.2.0/lib/native/libhadoop.so.1.0.0: /lib64/libc.so.6: version `GLIBC_2.14' not found (required by /hadoop-2.2.0/lib/native/libhadoop.so.1.0.0)

Is it possible to compile the native library with glibc 2.12, because at the moment I am not able to upgrade glibc on the servers which run Hadoop.

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Where do you compile your libhadoop.so.1.0.0? It is more like that you compiled libhadoop.so.1.0.0 in a environment with glibc 2.14, but tried to use it in an environment only have glibc 2.12.

If you are using a hadoop compiled by yourself, then it is best to compile in an environment matching with your production.