Fixes#7721
When S3 server is configured with a filerGroup, it creates a MasterClient
to enable dynamic filer discovery. However, the KeepConnectedToMaster()
background goroutine was never started, causing GetMaster() to block
indefinitely in WaitUntilConnected().
This resulted in the log message:
WaitUntilConnected still waiting for master connection (attempt N)...
being logged repeatedly every ~20 seconds.
The fix adds the missing 'go masterClient.KeepConnectedToMaster(ctx)'
call to properly establish the connection to master servers.
Also adds unit tests to verify WaitUntilConnected respects context
cancellation.
see https://blog.aqwari.net/xml-schema-go/
1. go get aqwari.net/xml/cmd/xsdgen
2. Add EncodingType element for ListBucketResult in AmazonS3.xsd
3. xsdgen -o s3api_xsd_generated.go -pkg s3api AmazonS3.xsd
4. Remove empty Grantee struct in s3api_xsd_generated.go
5. Remove xmlns: sed s'/http:\/\/s3.amazonaws.com\/doc\/2006-03-01\/\ //' s3api_xsd_generated.go
Chris Lu
d80d8be012