We're using dovecot as a proxy between the user and an exchange server. All over a sudden we're getting:
Aug 27 13:16:07 mproxy dovecot: imap(username): Fatal: master: service(imap): child 18376 killed with signal 6 (core dumps disabled) Aug 27 13:16:09 mproxy dovecot: imap(username): Error: imapc(email.charite.de:993): Command '12 UID FETCH 0 (BODY.PEEK[])' failed with BAD: 12 The specified message set is invalid. Aug 27 13:16:09 mproxy dovecot: imap(username): Error: imapc: Mail FETCH failed: The specified message set is invalid. Aug 27 13:16:09 mproxy dovecot: imap(username): Panic: file mail-index-map.c: line 547 (mail_index_map_lookup_seq_range): assertion failed: (first_uid > 0) Aug 27 13:16:09 mproxy dovecot: imap(username): Error: Raw backtrace: /usr/lib/dovecot/libdovecot.so.0(+0x5f770) [0x7f76ad2d9770] -> /usr/lib/dovecot/libdovecot.so.0(+0x5f84e) [0x7f76ad2d984e] -> /usr/lib/dovecot/libdovecot.so.0(i_fatal+0) [0x7f76ad293f2e] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0xac44e) [0x7f76ad5f044e] -> /usr/lib/dovecot/libdovecot-storage.so.0(mail_index_lookup_seq+0x12) [0x7f76ad601372] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0x5ad94) [0x7f76ad59ed94] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0x5af02) [0x7f76ad59ef02] -> /usr/lib/dovecot/libdovecot-storage.so.0(mail_get_hdr_stream+0x34) [0x7f76ad5adb44] -> /usr/lib/dovecot/libdovecot-storage.so.0(index_mail_get_header_stream+0x107) [0x7f76ad5d7247] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0x5ab09) [0x7f76ad59eb09] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0x5ab95) [0x7f76ad59eb95] -> /usr/lib/dovecot/modules/lib20_mail_log_plugin.so(+0x1a0c) [0x7f76ac8a9a0c] -> /usr/lib/dovecot/modules/lib20_mail_log_plugin.so(+0x2159) [0x7f76ac8aa159] -> /usr/lib/dovecot/modules/lib15_notify_plugin.so(notify_contexts_mail_copy+0x5c) [0x7f76acaad18c] -> /usr/lib/dovecot/modules/lib15_notify_plugin.so(+0x22c6) [0x7f76acaae2c6] -> /usr/lib/dovecot/libdovecot-storage.so.0(mailbox_copy+0x6d) [0x7f76ad5b5fdd] -> /usr/lib/dovecot/libdovecot-storage.so.0(mailbox_move+0x15) [0x7f76ad5b60b5] -> dovecot/imap username 91.22.142.109 UID move [0x40ca95] -> dovecot/imap username 91.22.142.109 UID move [0x416cfc] -> dovecot/imap username 91.22.142.109 UID move [0x415d5f] -> dovecot/imap username 91.22.142.109 UID move [0x415e15] -> dovecot/imap username 91.22.142.109 UID move [0x416115] -> dovecot/imap username 91.22.142.109 UID move [0x4164a2] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_call_io+0x3f) [0x7f76ad2e9e6f] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0xd7) [0x7f76ad2ead77] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0x9) [0x7f76ad2e9ed9] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_run+0x38) [0x7f76ad2e9f58] -> /usr/lib/dovecot/libdovecot.so.0(master_service_run+0x13) [0x7f76ad299133]
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