[Wed Jan 02 00:55:19.233027 2019] [mpm_prefork:notice] [pid 25161] AH00171: Graceful restart requested, doing restart
apache2: ../../../src/util/support/threads.c:383: krb5int_key_delete: Assertion `destructors_set[keynum] == 1' failed.
[Wed Jan 02 00:55:19.326118 2019] [core:notice] [pid 25161] AH00060: seg fault or similar nasty error detected in the parent process
apache2: ../../../src/util/support/threads.c:383: krb5int_key_delete: Assertion `destructors_set[keynum] == 1' failed.
apache2: ../../../src/util/support/threads.c:383: krb5int_key_delete: Assertion `destructors_set[keynum] == 1' failed.
apache2: ../../../src/util/support/threads.c:383: krb5int_key_delete: Assertion `destructors_set[keynum] == 1' failed.
apache2: ../../../src/util/support/threads.c:383: krb5int_key_delete: Assertion `destructors_set[keynum] == 1' failed.
apache2: ../../../src/util/support/threads.c:383: krb5int_key_delete: Assertion `destructors_set[keynum] == 1' failed.
apache2: ../../../src/util/support/threads.c:383: krb5int_key_delete: Assertion `destructors_set[keynum] == 1' failed.
[Wed Jan 02 00:55:19.347698 2019] [:alert] [pid 12257] (4)Interrupted system call: FastCGI: read() from pipe failed (0)
[Wed Jan 02 00:55:19.347729 2019] [:alert] [pid 12257] (4)Interrupted system call: FastCGI: the PM is shutting down, Apache seems to have disappeared - bye