wohali commented on issue #1119: Could not open shard URL: https://github.com/apache/couchdb/issues/1119#issuecomment-362327942 For others, so you don't have to sign up for a JIRA account, here's the text (2600/teletype): > On debian 8.6 ander openvz container fax attachment cannot be attached to email. > Root of issue call "file:read_file(ToFile)" return enoent > Fragment of strace cammnad output `stat("/tmp/a0b205e547697bcd.pdf", 0x7f5a29a1ed00) = -1 ENOENT (No such file or directory)` > Think OTP have bug that appears only Debian 8.6 virtualized under openvz on Proxmox 3.4 (two years old). Tested command `tiff2pdf -o ~s ~s &> /dev/null && echo -n \"success\""` on OTP-18.3.4.5 @sergey-safarov This doesn't directly apply because the operation to open a CouchDB shard file is not an `os:cmd` operation, but an internal Erlang operation. You may be right that in your specific configuration there is an issue, but the above information points more likely to a very slow disk (unable to open file for 4.0 seconds is *very very slow*.) Are you able to reproduce this issue when you are _not_ running under Docker and proxmox? We see sporadic reports of this type of behaviour and don't really have a good way to resolve this. Increasing this timeout as a default could lead to very bad performance for CouchDB in other situations; putting every single timeout into `local.ini` is not a good solution, either.
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