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I tried to install snappy compression with MapR following the steps in : http://code.google.com/p/hadoop-snappy/ previously installing the native library from : http://code.google.com/p/snappy/ and Jobtracker and tasktrackers manage to detect it and load it , but when they try to use it in a sequence file then fails abruptely : 2012-03-21 10:40:43,404 FATAL org.apache.hadoop.mapred.Child: Error running child : java.lang.UnsatisfiedLinkError: org.apache.hadoop.io.compress.snappy.SnappyCompressor.compressBytesDirect()I at org.apache.hadoop.io.compress.snappy.SnappyCompressor.compressBytesDirect(Native Method) at org.apache.hadoop.io.compress.snappy.SnappyCompressor.compress(SnappyCompressor.java:229) at It seems a problem concerning native library loading.Is anyone facing this problem about hadoop-snappy native library ? I tried to patch hadoop-snappy with this : http://code.google.com/p/hadoop-snappy/issues/detail?id=6 but doesn't compile (RTL_DEFAULT symbol missing). Thanks |
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Hi, Please upgrade to v.1.2.3 (http://package.mapr.com/releases/v1.2.3/) and follow instructions from http://code.google.com/p/hadoop-snappy/ . It should work. |
