Re: hbase shell >list results in NativeException: java.lang.NullPointerException: null

[Arno Strittmatter]

The quick response is much appreciated, thank you Jean-Daniel.




Thank you

 

After configuring debug I deleted the old logs, configured a new hbase directory (to be clean) and started in distributed mode. The the attached tarball contains configuration files, log files, and a screen trace. There is an error in the region server log files about a possible data loss, but the reason seems not evident. I think the debug mode resulted in the shell showing some internal tables upon the list command, still the error appears.

hbasetrace.tar.gz
Description: GNU Zip compressed data

On Dec 22, 2008, at 7:25 AM, Jean-Daniel Cryans wrote:

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

jira right away since I've already seen that)


logs and look for anything exception.

Thx,

J-D

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 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 On Mon, Dec 22, 2008 at 5:43 AM, Arno Strittmatter <s...@venevita.net> 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'

`get
egionServerWithRetries'
      from org/apache/hadoop/hbase/client/MetaScanner.java:56:in
`metaScan'
      from org/apache/hadoop/hbase/client/MetaScanner.java:30:in
`metaScan'

`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'

`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'

`call'

`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 (hbase):2:in `binding'hbase(main):002:0>
hbase(main):003:0*

from org/apache/hadoop/hbase/client/HConnectionManager.java: 863:in from org/apache/hadoop/hbase/client/HConnectionManager.java: 297:in from org/jruby/internal/runtime/methods/DynamicMethod.java: 70:in from org/jruby/internal/runtime/methods/DynamicMethod.java: 74:in from org/jruby/internal/runtime/methods/CompiledMethod.java: 48:in from /usr/local/hbase/hbase-0.18.1/bin/../bin/hirb.rb:242:in `list'