Engine may hang due to races when starting crypt thread and simultaneous
shutdown
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Key: CORE-6360
URL: http://tracker.firebirdsql.org/browse/CORE-6360
Project: Firebird Core
Issue Type: Bug
Components: Engine
Affects Versions: 3.0.6, 4.0 Beta 2
Reporter: Alexander Peshkov
When CM thread starting it assigns its internal attachment flag
"ATT_crypt_thread", but on short connection this attachment and shutdown racing
and flag may be never assigned therefore attachment and CM thread can not
properly stopped causing server hang.
Reproducing:
#!/bin/bash
set -e
echo Auto = y > plugins/DbCrypt_example.conf
rm tmp.fdb
echo "create database 'tmp.fdb';" | bin/isql -u sysdba -p masterkey
while true; do
cp tmp.fdb repro.fdb; echo 'alter database encrypt with "DbCrypt_example";'|
bin/isql -u sysdba -p masterkey repro.fdb
done
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