Server crashes while switching to the shadow if the disk I/O fault happens while flushing the cache [CORE3873]

[firebird-automations]

Submitted by: @dyemanov

This happens only if there are not active attachments at this point, e.g.:

- SS and FW=OFF: last user disconnects from the database
- CS and FW=OFF: any user disconnects from the database
- any arch and FW: the server is shutting down with active transactions

Unfortunately, some code parts attempt to access the NULL attachment pointer regardless.

Commits: 81ea92c 1636bb0

[firebird-automations]

Modified by: @dyemanov

assignee: Dmitry Yemanov [ dimitr ]

[firebird-automations]

Modified by: @dyemanov

status: Open [ 1 ] => In Progress [ 3 ]

[firebird-automations]

Modified by: @dyemanov

description: There is no active attachment at this moment, but some code parts attempt to access the NULL pointer regardless. => This happens only if there are not active attachments at this point, e.g.:

- SS and FW=OFF: last user disconnects from the database
- CS and FW=OFF: any user disconnects from the database
- any arch and FW: the server is shutting down with active transactions

Unfortunately, some code parts attempt to access the NULL attachment pointer regardless.

summary: Server crashes while switching to the shadow if the disk I/O fault happens while flushing the cache during the engine shutdown => Server crashes while switching to the shadow if the disk I/O fault happens while flushing the cache

[firebird-automations]

Modified by: @dyemanov

status: In Progress [ 3 ] => Open [ 1 ]

[firebird-automations]

Modified by: @dyemanov

status: Open [ 1 ] => Resolved [ 5 ]

resolution: Fixed [ 1 ]

Fix Version: 2.5.2 [ 10450 ]

Fix Version: 3.0 Alpha 1 [ 10331 ]

[firebird-automations]

Modified by: @pcisar

status: Resolved [ 5 ] => Closed [ 6 ]

[firebird-automations]

Modified by: @pavel-zotov

status: Closed [ 6 ] => Closed [ 6 ]

QA Status: Cannot be tested