REST API to query Apache HBase in Azure HDInsight
This article describes troubleshooting steps and possible resolutions for issues when interacting with Azure HDInsight clusters.
Using Apache HBase REST interface to query a table under a namespace other than the default results in a runtime error (HTTP status 500).
HBase REST API is only supported when using the default namespace. This is a known issue with regards to using HBase namespaces or making calls that refer to specific GETs on columns with column families with REST server on HDInsight. This is because of a security issue with HDInsight Gateway. When using the API to create a table with a namespace, accessing columns via column families, you need specify the
: character, which is considered a security problem in the IIS Gateway module.
Bypass the Gateway/REST server by deploying your application on a VM that is located in the same Azure VNet as the HDInsight cluster. Then you can communicate with HBase either directly via RPC (bypassing REST server entirely), or to individual REST servers running on worker nodes bypassing HDInsight Gateways.
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