Race condition causing deadlock when creating log file

[abumq]

When log rotation truncates the file and file is being created. Last log message seen is

22:51:56,265 [AdminHandler] [INFO] FSR: Prepending 'level' format specifier in filename for logger [sample-app] as we have multiple filenames for levels
22:51:56,265 [AdminHandler] [INFO] FSR: [/tmp/logs/sample-app.log] => [/tmp/logs/backups/sample-app/] as [global-2018.log]
22:51:56,265 [AdminHandler] [INFO] FSR: Result: [/tmp/logs/backups/sample-app/] [2018.tar.gz] with [3] items
22:51:56,265 [AdminHandler] [vDETAILS] [log-rotator.cc:272] Ignoring rotating empty file /tmp/logs/sample-app-verbose.log
22:51:56,265 [AdminHandler] [vDETAILS] [log-rotator.cc:272] Ignoring rotating empty file /tmp/logs/sample-app-debug.log
22:51:56,265 [AdminHandler] [vDETAILS] [log-rotator.cc:261] Rotating [/tmp/logs/sample-app.log] => [/tmp/logs/backups/sample-app/global-2018.log] (1.2GB)
22:51:56,265 [LogDispatcher] [vDEBUG] [log-request-handler.cc:185] Force check: 0, clientRef: 0x7000098bddf0, *clientRef: muflihun00102030, bypassChecks: 1
22:51:56,265 [LogDispatcher] [ERROR] File not found [/tmp/logs/sample-app.log] [Logger: sample-app]. Creating...
22:51:56,265 [LogDispatcher] [INFO] Accessing file...

The next line is updating permission but there is no lock required from this point onwards so not sure why is this happening