Tengo la configuración de la base de datos MongoDB en un servidor Linux junto con un tomcat y todo funciona muy bien. Pero noté que cada 2 o 4 días se eliminan todas las colecciones de la base de datos. Vi el registro de MongoDB:

 Mon Jan 16 08:01:14.375 [PeriodicTask::Runner] task: DBConnectionPool-cleaner took: 11ms Mon Jan 16 08:01:14.404 [PeriodicTask::Runner] task: WriteBackManager::cleaner took: 12ms Mon Jan 16 08:01:18.402 [TTLMonitor] query PLEASE_READ.system.indexes query: { expireAfterSeconds: { $exists: true } } ntoreturn:0 ntoskip:0 nscanned:1 keyUpdates:0 locks(micros) r:104348 nreturned:0 reslen:20 104ms Mon Jan 16 08:25:03.640 [initandlisten] connection accepted from 95.211.153.138:58622 #135 (7 connections now open) Mon Jan 16 08:25:04.286 [conn135] dropDatabase PLEASE_READ starting Mon Jan 16 08:25:04.287 [conn135] removeJournalFiles Mon Jan 16 08:25:04.490 [conn135] dropDatabase PLEASE_READ finished Mon Jan 16 08:25:04.508 [conn135] command PLEASE_READ.$cmd command: { dropDatabase: 1.0 } ntoreturn:1 keyUpdates:0 locks(micros) W:246737 reslen:62 246ms Mon Jan 16 08:25:04.579 [conn135] dropDatabase server_db starting Mon Jan 16 08:25:04.579 [conn135] removeJournalFiles Mon Jan 16 08:25:04.686 [conn135] dropDatabase server_db finished Mon Jan 16 08:25:04.686 [conn135] command server_db.$cmd command: { dropDatabase: 1.0 } ntoreturn:1 keyUpdates:0 locks(micros) W:107150 reslen:60 107ms Mon Jan 16 08:25:04.756 [conn135] dropDatabase local starting Mon Jan 16 08:25:04.756 [conn135] removeJournalFiles Mon Jan 16 08:25:04.780 [conn135] dropDatabase local finished Mon Jan 16 08:25:04.850 [conn135] dropDatabase admin starting Mon Jan 16 08:25:04.850 [conn135] removeJournalFiles Mon Jan 16 08:25:04.852 [conn135] dropDatabase admin finished Mon Jan 16 08:25:04.922 [conn135] dropDatabase test starting Mon Jan 16 08:25:04.922 [conn135] removeJournalFiles Mon Jan 16 08:25:04.926 [conn135] dropDatabase test finished Mon Jan 16 08:25:05.139 [conn135] allocating new ns file /var/lib/mongodb/WARNING.ns, filling with zeroes... Mon Jan 16 08:25:05.502 [FileAllocator] allocating new datafile /var/lib/mongodb/WARNING.0, filling with zeroes... Mon Jan 16 08:25:05.537 [FileAllocator] done allocating datafile /var/lib/mongodb/WARNING.0, size: 64MB, took 0.009 secs Mon Jan 16 08:25:05.547 [FileAllocator] allocating new datafile /var/lib/mongodb/WARNING.1, filling with zeroes... Mon Jan 16 08:25:05.567 [conn135] build index WARNING.WARNING { _id: 1 } Mon Jan 16 08:25:05.569 [FileAllocator] done allocating datafile /var/lib/mongodb/WARNING.1, size: 128MB, took 0.021 secs Mon Jan 16 08:25:05.592 [conn135] build index done. scanned 0 total records. 0.023 secs Mon Jan 16 08:25:05.653 [conn135] insert WARNING.WARNING ninserted:1 keyUpdates:0 locks(micros) w:492848 513ms

No uso un índice TTL para ninguna de las colecciones y no ejecuto ningún script en Linux para eliminar la base de datos.

Mi pregunta es ¿por qué se eliminan las colecciones? ¿Es la causa de la TTL?

Gracias.