[IMPALA-4737] If minidumps are disabled, SIGUSR1 goes unhandled and will crash the process

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: Impala 2.7.0
• Fix Version/s: Impala 2.10.0
• Component/s: Backend
• Labels: breakpad
• Target Version: Impala 2.10.0
• Assignee: Lars Volker
• Reporter: Lars Volker
• Created: 06/Jan/17 12:39
• Updated: 16/Aug/17 20:57
• Resolved: 16/Aug/17 20:57

Description

When disabling minidumps by setting 'minidump_path' to an empty string, the signal handler for SIGUSR1 in be/src/util/minidump.cc is not registered, leaving the signal unhandled. If someone sends that signal to the process, it will crash.

We should register a signal handler nonetheless and either ignore the signal or print a log message explaining that minidumps are disabled.