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From "gang.wang"<gang.w...@sky-data.cn>
Subject error (connection pointer is NULL) when using hawq pxf
Date Tue, 08 May 2018 08:24:48 GMT
Hi,hawq team:

I have met an error using hawq pxf.

Here is myenvironment:,, for hdfs,, for hawq and pxf.
centos 7.4
hawq version:2.2.0

I followed the example on ‘''https://cwiki.apache.org/confluence/display/HAWQ/PXF+Build+and+Install''’
'''CREATE EXTERNAL TABLE pxf_hdfs_textsimple ...’''

But,when I query the external table ,I got the error below:

postgres=# select * from pxf_hdfs_textsimple;
ERROR: Error dispatching to seg0 skyaxe-computing-0.localdomain:40000: connection pointer
Master unable to connect to seg0 skyaxe-computing-0.localdomain:40000: could not connect to
server: Connection refused
Is the server running on host "" and accepting
TCP/IP connections on port 40000?

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