Bug #12702: DRb client fails when calling out-of-process remote method with a block

• Status: Rejected
• Assignee: seki (Masatoshi Seki)
• Target version: -
• ruby -v: ruby 2.4.0dev (2016-08-24 trunk 55999) [x86_64-linux]
• Backport: 2.1: UNKNOWN, 2.2: UNKNOWN, 2.3: UNKNOWN

[djellemah (John Anderson)]

See attached code for test case.

applies to ruby-2.3.1 and ruby-2.4.0dev (2016-08-24 trunk 55999)

The problem starts in DRbObject#method_missing where
the code following DRb.here? is used for the in-process case which works.

But the code in the block for

succ, result = self.class.with_friend(@uri (Uri Gorelik)) do

is used for the out-of-process case. Here, DrbMessage#send_request fails
because b is a Proc, and in DrbMessage#dump the call to make_proxy fails
because DRbObject.new(b) fails.

[jeremyevans0 (Jeremy Evans)]

• Status changed from Open to Rejected

This is a bug in your code, you are not calling DRb.start_service in the client program. The client program needs a DRb server running in order to handle the sending-block-to-remote-method case. See the example in the "Client code" section of the DRb module rdoc.