Arno, Could you enable DEBUG and see what it tells you? See http://wiki.apache.org/hadoop/Hbase/FAQ#5
Also, I may recognize this trace and this NPE is thrown after all the retries were done to get a single row but for a dumb reason, we do not check if something is null. (Even if it's not that, I'm going to open a bug in jira right away since I've already seen that) What it would hide under this is that it cannot contact your region server. Maybe something is wrong with your configuration, please have a look at the logs and look for anything exception. Thx, J-D On Mon, Dec 22, 2008 at 5:43 AM, Arno Strittmatter <[email protected]> wrote: > Hello > > fresh install of hbase 0.18.1 & hadoop 0.18.2 > hbase in non distributed mode w/o hadoop works fine > as soon as I add the configuration: > <property> > <name>hbase.rootdir</name> > <value>hdfs://yowb0i0.mydomain.com:8020/tmparno/</value> > <description>The directory shared by region servers. > </description> > </property> > and run bin/hbase shell > > list > I get an error stack. However the hbase directory does get created on hdfs. > The attached error stack. > > Thank you, > Arno > > r...@yowb0 conf]# ../bin/hbase shell > HBase Shell; enter 'help<RETURN>' for list of supported commands. > Version: 0.18.1, r707159, Wed Oct 22 12:43:06 PDT 2008 > hbase(main):001:0> list > NativeException: java.lang.NullPointerException: null > from org/apache/hadoop/hbase/client/ServerCallable.java:71:in > `getRegio > Name' > from org/apache/hadoop/hbase/client/HConnectionManager.java:863:in > `get > egionServerWithRetries' > from org/apache/hadoop/hbase/client/MetaScanner.java:56:in > `metaScan' > from org/apache/hadoop/hbase/client/MetaScanner.java:30:in > `metaScan' > from org/apache/hadoop/hbase/client/HConnectionManager.java:297:in > `lis > Tables' > from org/apache/hadoop/hbase/client/HBaseAdmin.java:117:in > `listTables' > from sun.reflect.NativeMethodAccessorImpl:-2:in `invoke0' > from sun.reflect.NativeMethodAccessorImpl:-1:in `invoke' > from sun.reflect.DelegatingMethodAccessorImpl:-1:in `invoke' > from java.lang.reflect.Method:-1:in `invoke' > from org/jruby/javasupport/JavaMethod.java:250:in > `invokeWithExceptionH > ndling' > from org/jruby/javasupport/JavaMethod.java:219:in `invoke' > from org/jruby/javasupport/JavaClass.java:416:in `execute' > from > org/jruby/internal/runtime/methods/SimpleCallbackMethod.java:67:in > `call' > from org/jruby/internal/runtime/methods/DynamicMethod.java:70:in > `call' > from org/jruby/runtime/CallSite.java:123:in `cacheAndCall' > ... 131 levels... > from > ruby.usr.local.hbase.hbase_minus_0_dot_18_dot_1.bin.hirbInvokermet > od__23$RUBY$startOpt:-1:in `call' > from org/jruby/internal/runtime/methods/DynamicMethod.java:74:in > `call' > from org/jruby/internal/runtime/methods/CompiledMethod.java:48:in > `call > from org/jruby/runtime/CallSite.java:123:in `cacheAndCall' > from org/jruby/runtime/CallSite.java:298:in `call' > from > ruby/usr/local/hbase/hbase_minus_0_dot_18_dot_1/bin//usr/local/hba > e/hbase-0.18.1/bin/../bin/hirb.rb:351:in `__file__' > from > ruby/usr/local/hbase/hbase_minus_0_dot_18_dot_1/bin//usr/local/hba > e/hbase-0.18.1/bin/../bin/hirb.rb:-1:in `__file__' > from > ruby/usr/local/hbase/hbase_minus_0_dot_18_dot_1/bin//usr/local/hba > e/hbase-0.18.1/bin/../bin/hirb.rb:-1:in `load' > from org/jruby/Ruby.java:512:in `runScript' > from org/jruby/Ruby.java:432:in `runNormally' > from org/jruby/Ruby.java:312:in `runFromMain' > from org/jruby/Main.java:144:in `run' > from org/jruby/Main.java:89:in `run' > from org/jruby/Main.java:80:in `main' > from /usr/local/hbase/hbase-0.18.1/bin/../bin/hirb.rb:242:in `list' > from (hbase):2:in `binding'hbase(main):002:0> > hbase(main):003:0* >
