hawq state 报错： the database is down, but Ambari shows all hawq services as being

此问题官方有给出解决方案：https://discuss.pivotal.io/hc/en-us/articles/221826748-Pivotal-HDB-state-indicates-the-database-is-down-but-Ambari-shows-all-Pivotal-HDB-services-as-being-up

Environment

Product	Version
Pivotal HDB (HAWQ)	2.x

Symptom

Pivotal HDB shows as "up" in Ambari:

However, the following issues are seen:

HAWQ state fails with the following:

[gpadmin@hdm1 ~]$ hawq stateFailed to connect to database, this script can only be run when the database is up.[gpadmin@hdm1 ~]$

Stopping HAWQ via command line or Ambari fails with the following:

20160630:05:45:42:039364 hawq_stop:hdm1:gpadmin-[ERROR]:-Failed to connect to the running database, please check master status

Error Message:

The HAWQ master log will show errors similar to this:

[gpadmin@hdm1 pg_log]$ grep -i /data/hawq/master/pg_log/hba hawq-2016-06-30_044655.csv2016-06-30 05:44:03.818472 PDT,"gpadmin","template1",p38928,th1711609984,"172.28.21.118","51844",2016-06-30 05:44:03 PDT,0,,,seg-10000,,,,,"FATAL","28000","no pg_hba.conf entry for host ""172.28.21.118"", user ""gpadmin"", database ""template1"", SSL off",,,,,,,0,,"auth.c",603,2016-06-30 05:45:42.491576 PDT,"gpadmin","template1",p39401,th1711609984,"172.28.21.118","51874",2016-06-30 05:45:42 PDT,0,,,seg-10000,,,,,"FATAL","28000","no pg_hba.conf entry for host ""172.28.21.118"", user ""gpadmin"", database ""template1"", SSL off",,,,,,,0,,"auth.c",603,[gpadmin@hdm1 pg_log]$

Cause

pg_hba.conf is set up incorrectly, so gpadmin does not have access to template1 from the HAWQ master host.

Resolution

Review the pg_hba.conf and the Pivotal HDB Allowing connections to HAWQ documentation to allow gpadmin access to database "template1" from the HAWQ master.

个人解决方法：

1、查看 /data/hawq/master/pg_hba.conf 文件被人修改过，添加了有两条重复记录，注释掉以后，重启mater成功。

2、通过ambari重启所有服务，部分segment 执行stop命令失败，手动执行：

hawq stop segment -M immediate

成功，执行：

hawq start segment 成功。

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hawq state 报错： the database is down, but Ambari shows all hawq services as being

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