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SQLite temp file is removed but still kept by java process
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You have an awful lot of processes accessing the same temporary file.

Maybe you are opening an SQLite connection, creating a transaction that requires a temporary file (see https://sqlite.org/tempfiles.html) and never completing that transaction.

And then go on to fork off a bunch of subprocesses that inherit the open file descriptors (see https://sqlite.org/howtocorrupt.html)