flock failed to lock maps file: errno = 35

Question

Tlaloc OP

Created Jul ’18

Replies 3

Boosts 1

Views 20k

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This morning when launching my OS X application in XCode it it logs two strange messages that I haven't seen before:

2018-07-29 12:11:57.265197-0600 appname[1642:302161] flock failed to lock maps file: errno = 35

2018-07-29 12:11:57.265620-0600 appname[1642:302161] flock failed to lock maps file: errno = 35

In the header file sys/errno.h this is defined as:

/* non-blocking and interrupt i/o */

#define EAGAIN 35 /* Resource temporarily unavailable */

This isn't a fatal error, the app runs normally after this. The project appears to log this before the multiple doc appplication loads its first doc window. I don't think I changed anything since yesterday when this wasn't happening.

What does this mean and how can I fix it?

Answered by Tlaloc in 324784022

Restarting my Mac and cleaning and rebuilding the project fixed this.

Boost

Answer 1

Tlaloc OP

Aug ’18

Accepted Answer

Restarting my Mac and cleaning and rebuilding the project fixed this.

1

Answer 2

NSBob OP

Oct ’18

I tried this also but it did not work for me; further research led to the determination that the messages are posted when I have a 'production' copy of my program running at the same time that also has the database file open. Yes...bad practice, but no major mishap has occurred so far and back-ups abound.

5

Answer 3

GeekyChick OP

Feb ’20

Thank-you, NSBob! I was running two versions of the same Mac app. Closing the production one, resolved the problem. No database was involved.

2