[HBASE-8202] MultiTableOutputFormat should support writing to another HBase cluster

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Won't Fix
• Component/s: mapreduce
• Assignee: Unassigned
• Reporter: Ted Yu
• Created: 27/Mar/13 17:39
• Updated: 16/Jun/22 16:44
• Resolved: 16/Jun/22 16:44

Description

This was brought up by David Koch in thread 'hbase.mapred.output.quorum ignored in Mapper job with HDFS source and HBase sink' where he wanted to import a file on HDFS from one cluster A (source) into HBase
tables on a different cluster B (destination) using a Mapper job with an
HBase sink.

Here is my analysis:

MultiTableOutputFormat doesn't extend TableOutputFormat:

public class MultiTableOutputFormat extends OutputFormat<ImmutableBytesWritable, Mutation> {

Relevant configuration w.r.t. output quorum is setup in TableOutputFormat#setConf():

  public void setConf(Configuration otherConf) {
    this.conf = HBaseConfiguration.create(otherConf);
    String tableName = this.conf.get(OUTPUT_TABLE);
    if(tableName == null || tableName.length() <= 0) {
      throw new IllegalArgumentException("Must specify table name");
    }
    String address = this.conf.get(QUORUM_ADDRESS);
    int zkClientPort = conf.getInt(QUORUM_PORT, 0);
    String serverClass = this.conf.get(REGION_SERVER_CLASS);
    String serverImpl = this.conf.get(REGION_SERVER_IMPL);
    try {
      if (address != null) {
        ZKUtil.applyClusterKeyToConf(this.conf, address);
      }