Can't synchronize library due to riching limit of opened file descriptors

[IevgenSobko]

When I'm trying to add my library folder after some time application crashes with

SAVING ARTWORK FOR:  "Worlds Apart"
[lastfm service]:  "http://ws.audioscrobbler.com/2.0/?method=album.getinfo&api_key=ba6f0bd3c887da9101c10a50cf2af133&artist=Silent Force&album=Walk The Earth"
SAVING ARTWORK FOR:  "The Empire Of Future"
ERROR OPENING DB "out of memory Error opening database" "{1977a9d8-ecd7-47d7-bc01-ba33ab2867a7}"
ERROR OPENING DB "out of memory Error opening database" "{a0d92182-3a53-4a0a-ab3e-72d5ef126364}"
ERROR OPENING DB "out of memory Error opening database" "{90ebb3c4-7694-4b45-baa2-74f7731bb2c1}"
ERROR OPENING DB "out of memory Error opening database" "{67335ec6-cd43-4f7d-9a86-a7a44da94cf0}"
ERROR OPENING DB "out of memory Error opening database" "{314dcb22-ea7c-48c5-afd8-135df1a0aa87}"
QNetworkReply::NetworkError(SslHandshakeFailedError)
ERROR OPENING DB "out of memory Error opening database" "{85d9dda0-4882-4470-a7a7-b6158640d68d}"
ERROR OPENING DB "out of memory Error opening database" "{aad94610-ae1f-44a6-a5e9-62a828108899}"
ERROR OPENING DB "out of memory Error opening database" "{4eb511d6-1526-47f4-9928-aa8db4b6194f}"
ERROR OPENING DB "out of memory Error opening database" "{99ed76e3-65b0-4893-aaed-05ff66bbffbe}"
ERROR OPENING DB "out of memory Error opening database" "{a3f21a72-7c0b-46c0-8fa6-671232d87c7a}"
ERROR OPENING DB "out of memory Error opening database" "{eecf043c-24f3-4c0c-9ccf-ff8ebfbfb948}"
ERROR OPENING DB "out of memory Error opening database" "{18e662e3-3e03-413e-b53f-ac39300c2810}"
ERROR OPENING DB "out of memory Error opening database" "{fd6cbdae-5fdd-45b9-aabc-cb1988990bec}"
ERROR OPENING DB "out of memory Error opening database" "{cb4b8115-0d16-48da-8757-0bc365a90a2b}"
ERROR OPENING DB "out of memory Error opening database" "{0642947a-33ae-4fb2-b3c3-5bf24e85322c}"
ERROR OPENING DB "out of memory Error opening database" "{a5d38ed6-1e5c-404f-a49f-ac39b9a147f4}"
ERROR OPENING DB "out of memory Error opening database" "{51a8e9af-1411-4545-87a0-887b7c31e6f7}"
ERROR OPENING DB "out of memory Error opening database" "{c29efc71-9f12-49d5-930a-a0a5b8240943}"
ERROR OPENING DB "out of memory Error opening database" "{c58e3752-4e6c-42c9-a355-4e8990023cc3}"
ERROR OPENING DB "out of memory Error opening database" "{89ed47c2-489d-455b-ab3f-e7a1ba8ceb3b}"
ERROR OPENING DB "out of memory Error opening database" "{414b4fbc-1ad9-4b3f-b38c-639cf99ff9f1}"
ERROR OPENING DB "out of memory Error opening database" "{9a8e425c-3b8c-48e6-ae77-b813c2295ec5}"
ERROR OPENING DB "out of memory Error opening database" "{7404bc4f-8405-4591-a05f-f4183ecf84b9}"
ERROR OPENING DB "out of memory Error opening database" "{e7b306b5-1194-4f7e-bdc9-84dd8cbd8f98}"
ERROR OPENING DB "out of memory Error opening database" "{cfe8752f-e809-44cc-813f-f7d920165e1e}"
ERROR OPENING DB "out of memory Error opening database" "{be0afa3c-d5f5-44f0-bf15-5cfcc2c4af92}"
ERROR OPENING DB "out of memory Error opening database" "{cee24d9f-b014-4f16-8b58-4cd95893eeaf}"
ERROR OPENING DB "out of memory Error opening database" "{e797b0f4-5567-405f-9357-9a6b44aa6daa}"
ERROR OPENING DB "out of memory Error opening database" "{66e77385-31de-4076-be8e-29a637816ee0}"
ERROR OPENING DB "out of memory Error opening database" "{e28c0f08-b349-4ef5-9c6e-612289fc6a63}"
ERROR OPENING DB "out of memory Error opening database" "{eb6a97ec-bfd3-4ed5-b05b-2fe19046c9bf}"
ERROR OPENING DB "out of memory Error opening database" "{a8b03956-8622-4bdf-a737-2b897a3e3163}"
ERROR OPENING DB "out of memory Error opening database" "{23e8fb0a-c903-4653-9d7a-bfd24c87d5d8}"

Investigation showed that when you starting to synchronize some information about collection from internet you are opening a lot of new file descriptors to the same collection.db file and finally it reaches maximum limit of number of opened files(1024 - I think it is default on all linux systems) and finally crashes with the above error.

You can use ls -l /proc/$(pgrep babe)/fd | wc -l to see number of opened descriptors of babe process once you start it