Can you provide us gdb bt full dump? gdb /usr/libexec/dovecot/replicator /path/to/core
on some systems, it's /usr/lib/dovecot/replicator Aki On 21.03.2017 23:48, Daniel Miller wrote: > I have the following in my log: > > Mar 21 14:46:59 bubba dovecot: replicator: Panic: data stack: Out of > memory when allocating 1073741864 bytes > Mar 21 14:46:59 bubba dovecot: replicator: Error: Raw backtrace: > /usr/local/lib/dovecot/libdovecot.so.0(+0x97c90) [0x7f4638a7cc90] -> > /usr/local/lib/dovecot/libdovecot.so.0(+0x97d6e) [0x7f4638a7cd6e] -> > /usr/local/lib/dovecot/libdovecot.so.0(i_fatal+0) [0x7f4638a14322] -> > /usr/local/lib/dovecot/libdovecot.so.0(+0x95e3f) [0x7f4638a7ae3f] -> > /usr/local/lib/dovecot/libdovecot.so.0(+0x9608b) [0x7f4638a7b08b] -> > /usr/local/lib/dovecot/libdovecot.so.0(+0xb15f8) [0x7f4638a965f8] -> > /usr/local/lib/dovecot/libdovecot.so.0(+0x93c42) [0x7f4638a78c42] -> > /usr/local/lib/dovecot/libdovecot.so.0(buffer_write+0x74) > [0x7f4638a78fb4] -> dovecot/replicator(replicator_queue_push+0x13b) > [0x40519b] -> dovecot/replicator() [0x4049c2] -> dovecot/replicator() > [0x4040a8] -> dovecot/replicator() [0x404275] -> > /usr/local/lib/dovecot/libdovecot.so.0(io_loop_call_io+0x52) > [0x7f4638a907d2] -> > /usr/local/lib/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0xe7) > [0x7f4638a91d17] -> > /usr/local/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0x3c) > [0x7f4638a9086c] -> > /usr/local/lib/dovecot/libdovecot.so.0(io_loop_run+0x38) > [0x7f4638a90a28] -> > /usr/local/lib/dovecot/libdovecot.so.0(master_service_run+0x13) > [0x7f4638a1dfc3] -> dovecot/replicator(main+0x17a) [0x40342a] -> > /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf5) > [0x7f4638640ec5] -> dovecot/replicator() [0x4034c5] > Mar 21 14:47:00 bubba dovecot: replicator: Fatal: master: > service(replicator): child 15650 killed with signal 6 (core dumped) >