[THRIFT-4465] TNonblockingServer throwing THRIFT LOGGER: TConnection::workSocket(): THRIFT_EAGAIN (unavailable resources)

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 0.11.0
• Fix Version/s: 0.12.0
• Component/s: C++ - Library
• Assignee: James E. King III
• Reporter: Buğra Gedik
• Created: 21/Jan/18 08:58
• Updated: 27/Dec/18 15:24
• Resolved: 12/Mar/18 10:57

Description

Once I upgraded to 0.11.0, I'm getting the following error occasionally:

THRIFT LOGGER: TConnection::workSocket(): THRIFT_EAGAIN (unavailable resources)

I tracked this to the following change: https://github.com/apache/thrift/commit/808d143245f4f5c30600fab31cf9db854cbf5b48#diff-fe8fec8ec38ea35df64cfcc305e3ab08
 

// Work the socket right away

- // workSocket();

+ workSocket();

While adding SSL support, @dthaluru has re-activated the above line. From my own testing, this causes occasional THRIFT_EAGAIN exceptions. It seems like this is due to calling workSocket() too early and the socket gets a read call in non-blocking mode before it has data.

Issue Links

• is caused by: THRIFT-4276 Add SSL support to the C++ Nonblocking Server
• links to: GitHub Pull Request #1497