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From Ted Yu <yuzhih...@gmail.com>
Subject Re: Hadoop Java exception
Date Thu, 08 Oct 2015 16:59:24 GMT
Looks like htrace jar was missing from the classpath.

jar  tvf htrace-core-3.1.0-incubating.jar | grep Trace
  1187 Thu Jan 15 11:36:52 UTC 2015
org/apache/htrace/HTraceConfiguration$MapConf.class
  3195 Thu Jan 15 11:36:52 UTC 2015
org/apache/htrace/HTraceConfiguration.class
  5247 Thu Jan 15 11:36:52 UTC 2015 org/apache/htrace/Trace.class

FYI

On Thu, Oct 8, 2015 at 9:09 AM, Odin Guillermo Caudillo Gallegos <
odin.guillermo@gmail.com> wrote:

> Hi.
> I'm doing a code to write a file on HDFS, i tried a few ways to do it, but
> i always get the following error:
> Do i need another library? i include all the libraries in the
> share/hadoop/common/lib folder and still getting it
>
> Exception in thread "main" java.lang.NoClassDefFoundError: org/htrace/Trace
> at org.apache.hadoop.hdfs.DFSOutputStream.<init>(DFSOutputStream.java:1703)
> at
> org.apache.hadoop.hdfs.DFSOutputStream.newStreamForCreate(DFSOutputStream.java:1756)
> at org.apache.hadoop.hdfs.DFSClient.create(DFSClient.java:1668)
> at org.apache.hadoop.hdfs.DFSClient.create(DFSClient.java:1593)
> at
> org.apache.hadoop.hdfs.DistributedFileSystem$6.doCall(DistributedFileSystem.java:397)
> at
> org.apache.hadoop.hdfs.DistributedFileSystem$6.doCall(DistributedFileSystem.java:393)
> at
> org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81)
> at
> org.apache.hadoop.hdfs.DistributedFileSystem.create(DistributedFileSystem.java:393)
> at
> org.apache.hadoop.hdfs.DistributedFileSystem.create(DistributedFileSystem.java:337)
> at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:909)
> at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:802)
> at test.HDFSMain.main(HDFSMain.java:25)
> Caused by: java.lang.ClassNotFoundException: org.htrace.Trace
> at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
> at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
> at java.security.AccessController.doPrivileged(Native Method)
> at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
> at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
> ... 12 more
>
> Thanks
>

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