在ubuntu上，使用couchbase 2.5.1、cloudera cdh4、couchbase的hadoop插件和oracle jdk 6。一切都安装得很好（看起来），我可以独立地使用hadoop和couchbase而没有任何问题，但是当我尝试使用以下插件时

sqoop import --connect http://127.0.0.1:8091/ --table DUMP

我得到以下错误

Please set $ACCUMULO_HOME to the root of your Accumulo installation.
14/04/11 11:44:08 INFO sqoop.Sqoop: Running Sqoop version: 1.4.3-cdh4.6.0
14/04/11 11:44:08 INFO tool.CodeGenTool: Beginning code generation
14/04/11 11:44:08 INFO orm.CompilationManager: HADOOP_MAPRED_HOME is /usr/lib/hadoop-0.20-mapreduce
Note: /tmp/sqoop-vagrant/compile/30e6774902d338663db059706cde5b12/DUMP.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
14/04/11 11:44:09 INFO orm.CompilationManager: Writing jar file: /tmp/sqoop-vagrant/compile/30e6774902d338663db059706cde5b12/DUMP.jar
14/04/11 11:44:09 INFO mapreduce.ImportJobBase: Beginning import of DUMP
14/04/11 11:44:09 WARN util.Jars: No such class couchbase doesn't use a jdbc driver available.
14/04/11 11:44:11 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:8021. Already tried 0 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
14/04/11 11:44:12 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:8021. Already tried 1 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
14/04/11 11:44:13 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:8021. Already tried 2 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)

知道我哪里出错了吗？或者我能做些什么来找出答案？