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https://issues.apache.org/jira/browse/HBASE-13050?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14322830#comment-14322830
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Matteo Bertozzi commented on HBASE-13050:
-----------------------------------------
we should have a test for the namespace validation similar to what we have for
table names.
See TestTableName.java, we have also a specific testEmptyTableName().
> Hbase shell create_namespace command throws ArrayIndexOutOfBoundException for
> (invalid) empty text input.
> ---------------------------------------------------------------------------------------------------------
>
> Key: HBASE-13050
> URL: https://issues.apache.org/jira/browse/HBASE-13050
> Project: HBase
> Issue Type: Bug
> Reporter: Abhishek Kumar
> Priority: Trivial
> Attachments: 0001-HBASE-13050.patch
>
>
> {noformat}
> hbase(main):008:0> create_namespace ''
> ERROR: java.io.IOException: 0
> at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:2072)
> at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:107)
> at
> org.apache.hadoop.hbase.ipc.RpcExecutor.consumerLoop(RpcExecutor.java:130)
> at org.apache.hadoop.hbase.ipc.RpcExecutor$1.run(RpcExecutor.java:107)
> at java.lang.Thread.run(Thread.java:745)
> Caused by: java.lang.ArrayIndexOutOfBoundsException: 0
> at
> org.apache.hadoop.hbase.TableName.isLegalNamespaceName(TableName.java:222)
> at
> org.apache.hadoop.hbase.TableName.isLegalNamespaceName(TableName.java:205)
> {noformat}
> TableName.isLegalNamespaceName tries to access namespaceName[offset] in case
> of empty text input and also this check for 'offset==length' in this method
> seems to be unnecessary and an empty input validation check can be put in
> the beginning of this method instead:
> {noformat}
> public static void isLegalNamespaceName(byte[] namespaceName, int offset,
> int length) {
> // can add empty check in the beginning
> if(length == 0) {
> throw new IllegalArgumentException("Namespace name must not be empty");
> }
> // end
> for (int i = offset; i < length; i++) {
> if (Character.isLetterOrDigit(namespaceName[i])|| namespaceName[i] ==
> '_') {
> continue;
> }
> throw new IllegalArgumentException("Illegal character <" +
> namespaceName[i] +
> "> at " + i + ". Namespaces can only contain " +
> "'alphanumeric characters': i.e. [a-zA-Z_0-9]: " +
> Bytes.toString(namespaceName,
> offset, length));
> }
> // can remove below check
> if(offset == length)
> throw new IllegalArgumentException("Illegal character <" +
> _namespaceName[offset] _+
> "> at " + offset + ". Namespaces can only contain " +
> "'alphanumeric characters': i.e. [a-zA-Z_0-9]: " +
> Bytes.toString(namespaceName,
> offset, length));
> //
> }
> {noformat}
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