尝试在 CDH4 集群上使用 Presto 读取 snappy 压缩表。Hive 可以读取表格，但 Presto 抱怨缺少原生库。
从 CDH 添加 java.library.path 似乎没有帮助。（添加到 jvm.config）
-Djava.library.path=/opt/cloudera/parcels/CDH-4.4.0-1.cdh4.4.0.p0.39/lib/hadoop/lib/native
这是堆栈跟踪
Caused by: java.lang.RuntimeException: native snappy library not available: SnappyCompressor has not been loaded.
at org.apache.hadoop.io.compress.SnappyCodec.checkNativeCodeLoaded(SnappyCodec.java:68) ~[na:na]
at org.apache.hadoop.io.compress.SnappyCodec.createDecompressor(SnappyCodec.java:196) ~[na:na]
at org.apache.hadoop.hive.ql.io.CodecPool.getDecompressor(CodecPool.java:35) ~[na:na]
at org.apache.hadoop.hive.ql.io.RCFile$Reader.init(RCFile.java:1314) ~[na:na]
at org.apache.hadoop.hive.ql.io.RCFile$Reader.<init>(RCFile.java:1154) ~[na:na]
at org.apache.hadoop.hive.ql.io.RCFile$Reader.<init>(RCFile.java:1133) ~[na:na]
at org.apache.hadoop.hive.ql.io.RCFileRecordReader.<init>(RCFileRecordReader.java:102) ~[na:na]
at org.apache.hadoop.hive.ql.io.RCFileInputFormat.getRecordReader(RCFileInputFormat.java:57) ~[na:na]
at com.facebook.presto.hive.HiveRecordSet$1.call(HiveRecordSet.java:185) ~[na:na]
...
库目录
ls -l /opt/cloudera/parcels/CDH-4.4.0-1.cdh4.4.0.p0.39/lib/hadoop/lib/native
total 564
-rwxr-xr-x 1 root root 133184 Sep 6 00:12 libhadoop.a
-rwxr-xr-x 1 root root 193020 Sep 6 00:12 libhadooppipes.a
lrwxrwxrwx 1 root root 18 Sep 6 08:26 libhadoop.so -> libhadoop.so.1.0.0
-rwxr-xr-x 1 root root 81680 Sep 6 00:12 libhadoop.so.1.0.0
-rwxr-xr-x 1 root root 58600 Sep 6 00:12 libhadooputils.a
-rwxr-xr-x 1 root root 77476 Sep 6 00:12 libhdfs.a
lrwxrwxrwx 1 root root 18 Sep 6 08:26 libsnappy.so -> libsnappy.so.1.1.3
lrwxrwxrwx 1 root root 18 Sep 6 08:26 libsnappy.so.1 -> libsnappy.so.1.1.3
-rwxr-xr-x 1 root root 23904 Sep 6 00:12 libsnappy.so.1.1.3