Is it possible write a buffer into HDFS from UDF Impala (C++ or Java)? So I'd like simulate UDTF in Impala. First call to UDF to write output in HDFS. Later, another query reads these data from HDFS.
If it is possible, it will be with libhdfs. How can I install libhdfs-dev in debian wheezy?
I have a similar scenario. Could you please let me know what kind of permissions are needed for Impala UDF to be able to write into HDFS and to which user (is it the user who is executing the UDF or technical user "impala"?)