CODEWITHSUNDEEP
javacygwinhbase
Jack Gibson
Jack Gibson

Reputation: 1841

HBase 0.92 Standalone on Windows with Cygwin

Does anybody know a tutorial how HBase can be run on Windows under Cygwin?

I managed to setup everything such as the keys for auto login with SSH but Im stuck with following error message:

localhost: +======================================================================+
localhost: |      Error: JAVA_HOME is not set and Java could not be found         |
localhost: +----------------------------------------------------------------------+
localhost: | Please download the latest Sun JDK from the Sun Java web site        |
localhost: |       > http://java.sun.com/javase/downloads/ <                      |
localhost: |                                                                      |
localhost: | HBase requires Java 1.6 or later.                                    |
localhost: | NOTE: This script will find Sun Java whether you install using the   |
localhost: |       binary or the RPM based installer.                             |
localhost: +======================================================================+

...

java.lang.NoClassDefFoundError: org/apache/zookeeper/KeeperException
        at java.lang.Class.getDeclaredMethods0(Native Method)
        at java.lang.Class.privateGetDeclaredMethods(Unknown Source)
        at java.lang.Class.getMethod0(Unknown Source)
        at java.lang.Class.getMethod(Unknown Source)
        at sun.launcher.LauncherHelper.getMainMethod(Unknown Source)
        at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)
Caused by: java.lang.ClassNotFoundException: org.apache.zookeeper.KeeperException
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.net.URLClassLoader$1.run(Unknown Source)

I already set .bash_profile to point to:

export JAVA_HOME='/usr/lib/jre1.6.1'

which is symbolic link on the real jre

/usr/lib/jre1.6.1 -> /cygdrive/c/Java/jre7/

Upvotes: 8

Views: 5223

Answers (5)

user3409647
user3409647

Reputation: 1

hbase_classpath is not need, just change zookeeper.jar to azookeeper.jar

Upvotes: 0

shapkin
shapkin

Reputation: 377

I had the same issue and I found following: Cygwin use ":" as a path separator. But script that creates CLASS_PATH works incorrectly. Final CLASS_PATH looks like "...:zookeeper.jar:" with ":" at the end. Before run java script converting CLASS_PATH to Windows style. But with ":" at the end !!

So my solution is: just create an empty file "zzz.jar" under hbase/lib. zzz.jar will be very last in CLASS_PATH and zookeeper.jar will be added to CLASS_PATH correctly.

I know it is better to fix script, but I who cares :) I need HBase for 2 days only, so it works and I am happy :)

Upvotes: 5

Hisham
Hisham

Reputation: 442

For JAVA_HOME error, you can fix it by setting JAVA_HOME in the hbase\conf\hbase-env.sh.

For the class not found exception, try adding the hbase\lib to the HBASE_CLASSPATH under the same file.

Personally, I use the following two lines in my hbase-env.sh on a Windows 7 Environment + Cygwin:

export JAVA_HOME=/cygdrive/c/Program\ Files/Java/jdk1.7.0/

export HBASE_CLASSPATH=/cygdrive/c/programs/hbase-0.92.1/lib/

Upvotes: 4

b7kich
b7kich

Reputation: 4431

Use a VM to run hadoop in a Linux environment. With Java you may be facing issues typical under windows, adding Cygwin to the mix adds a whole other set, for example:

For tutorial purposes I highly recommend the cloudera demo VM and tutorial: https://ccp.cloudera.com/display/SUPPORT/Cloudera%27s+Hadoop+Demo+VM

https://ccp.cloudera.com/display/SUPPORT/Hadoop+Tutorial#HadoopTutorial-Purpose

Upvotes: 1

Chris Shain
Chris Shain

Reputation: 51339

EDIT:

The first error looks like Java is not being found, but the second error is clearly coming from Java, so the combination of these two errors is somewhat confusing. Are you sure that they are both being produced by the same script at the same time?

The second error is caused by not having the zookeeper jar file on the classpath. Try modifying the script or copying the jar into the hadoop lib dir.

Upvotes: 0

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