qian wang created FLINK-15097:
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             Summary: flink can not use user specified hdfs conf
                 Key: FLINK-15097
                 URL: https://issues.apache.org/jira/browse/FLINK-15097
             Project: Flink
          Issue Type: Bug
          Components: Client / Job Submission
    Affects Versions: 1.9.1
            Reporter: qian wang
         Attachments: 0001-adjust-read-hdfs-conf-order.patch

now if cluster node had set env HADOOP_CONF_DIR,flink would force use the 
hdfs-site.xml in the corresponding dir, then user who submitted app in the 
client node couldn't use custom specified hdfs-site.xml/hdfs-default through 
setting fs.hdfs.hdfssite or fs.hdfs.hdfsdefault so as to set custom blocksize 
or replication num. For example Using yarnship to upload my hdfs conf dir and 
set fs.hdfs.hdfssite direct to \{conf dir}/hdfs-site.xml is useless

Deep in code it is due to the order of choosing conf in HadoopUtils.java,the 
conf in HADOOP_CONF_DIR will override user's uploaded conf, i think the way is  
not sensible, so i reverse the order which flink read hdfs conf in order to let 
user custom conf uploaded override HADOOP_CONF_DIR



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