当我在centos 6.4中运行mapreduce jar时，有一个错误，请注意如下。
hadoop版本是2.6.0，适用于64位。
mapreduce失败了，如何解决？
Error: 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:64)
at org.apache.hadoop.io.compress.SnappyCodec.getCompressorType(SnappyCodec.java:133)
at org.apache.hadoop.io.compress.CodecPool.getCompressor(CodecPool.java:148)
at org.apache.hadoop.io.compress.CodecPool.getCompressor(CodecPool.java:163)
at org.apache.hadoop.io.SequenceFile$Writer.init(SequenceFile.java:1199)
at org.apache.hadoop.io.SequenceFile$Writer.<init>(SequenceFile.java:1092)
at org.apache.hadoop.io.SequenceFile$BlockCompressWriter.<init>(SequenceFile.java:1442)
at org.apache.hadoop.io.SequenceFile.createWriter(SequenceFile.java:275)
at org.apache.hadoop.io.SequenceFile.createWriter(SequenceFile.java:528)
at org.apache.hadoop.mapreduce.lib.output.SequenceFileOutputFormat.getSequenceWriter(SequenceFileOutputFormat.java:64)
at org.apache.hadoop.mapreduce.lib.output.SequenceFileOutputFormat.getRecordWriter(SequenceFileOutputFormat.java:75)
at org.apache.hadoop.mapred.ReduceTask$NewTrackingRecordWriter.<init>(ReduceTask.java:540)
at org.apache.hadoop.mapred.ReduceTask.runNewReducer(ReduceTask.java:614)
at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:389)
at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:163)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1628)
at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)
1条答案
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您需要为本机库编译hadoop源代码。这里提供了逐步说明。
视频包括验证、使用maven编译代码和使用本机库。