[vsdebug] Extension logger is too noisy when waiting for socket connection

[PranayAgarwal]

HHVM Version

HipHop VM 3.25.0-dev (rel)
Compiler: 1519268871_493360405
Repo schema: df346ce39f19608fe862842f8bd5b86c706e9fa3

Operating System and Version

• Ubuntu 16.04.3 LTS
• Can only repro in a Docker container (hhvm/hhvm:nightly image)

Problem

If an HHVM server is started with -v Eval.Debugger.VSDebugEnable=1 -v Eval.Debugger.VSDebugLogFile=xxx, the extension continuously logs a stream of "SocketTransport polling for connections..." messages to the log file.

In my latest repro it logged ~2 million lines in 90 seconds, generating a 1.3 GB file.

[ebluestein]

I'm looking into this now, I haven't been able to repro it yet but it could indicate the socket poll thread is spinning, which it is not supposed to do.

[ebluestein]

@PranayAgarwal I haven't been able to repro this on the latest HHVM. Does your log file contain any lines that start with "Polling inputs failed" (followed by an error code) ?