Github user karol-brejna-i commented on the issue:
https://github.com/apache/incubator-gearpump/pull/233
```[DEBUG] [13:07:44.774] [Docker$] Container master0====>> curl
http://master0:8090/api/v1.0/master
[DEBUG] [13:07:44.774] [Docker$] INPUT==>>
[DEBUG] [13:07:44.775] [ShellExec$] EXEC master0 => `docker exec master0
curl -s --cookie cookie.txt http://master0:8090/api/v1.0/master`
[DEBUG] [13:07:45.490] [ShellExec$] EXEC master0 <=
`{"masterDescription":{"leader":{"host":"master@master0","port":3000},"cluster":[{"host":"master0","port":3000}],"aliveFor":"18124","logFile":"/opt/gearpump/logs","jarStore":"jarstore/","masterStatus":...`
exit 0
[DEBUG] [13:07:45.490] [Docker$] <<==OUTPUT
[DEBUG] [13:07:45.490] [Docker$]
{"masterDescription":{"leader":{"host":"master@master0","port":3000},"cluster":[{"host":"master0","port":3000}],"aliveFor":"18124","logFile":"/opt/gearpump/logs","jarStore":"jarstore/","masterStatus":"synced","homeDirectory":"/opt/gearpump","activities":[],"jvmName":"7@master0","historyMetricsConfig":{"retainHistoryDataHours":72,"retainHistoryDataIntervalMs":3600000,"retainRecentDataSeconds":300,"retainRecentDataIntervalMs":15000}}}
[DEBUG] [13:07:45.491] [Docker$] <<====Command END. Container master0, curl
http://master0:8090/api/v1.0/master
```
Number 3 looks good on mac, too. For me it seems like some proxy-caused
redirect...
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