If you’re writing code that accesses HDFS and you get an exception that looks like this:
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/hadoop/thirdparty/guava/common/collect/LinkedListMultimap
at org.apache.hadoop.hdfs.SocketCache.<init>(SocketCache.java:48)
at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:240)
at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:208)
at org.apache.hadoop.hdfs.DistributedFileSystem.initialize(DistributedFileSystem.java:89)
at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:1563)
at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:67)
at org.apache.hadoop.fs.FileSystem$Cache.getInternal(FileSystem.java:1597)
at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:1579)
at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:228)
at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:111)
Make sure you include the guava-r09-jarjar.jar JAR in your build path. This is usually located in /usr/lib/hadoop-0.20/lib.