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Database monitoring may crash the server or badly affect its page locking logic [CORE1881] #2313

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firebird-issue-importer opened this issue May 5, 2008 · 7 comments

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@firebird-issue-importer firebird-issue-importer commented May 5, 2008

Submitted by: @dyemanov

The monitoring code unconditionally fetches the header page to report the actual database state. But, if being done at the AST level, this may cause two concurrent pending requests being linked to a single owner. The lock manager highly dislikes this situation and terminates the process via a bugcheck.

It can be reproduced under high load with the SuperClassic architecture. So far I was unable to see this issue on v2.1 Classic, maybe it could be explained by different synchronization techniques used. But anyway, I mark v2.1.0 as possibly affected and the fix will be committed into both branches.

Commits: ce7baa7 d55e7eb

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@firebird-issue-importer firebird-issue-importer commented May 5, 2008

Modified by: @dyemanov

assignee: Dmitry Yemanov [ dimitr ]

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@firebird-issue-importer firebird-issue-importer commented May 5, 2008

Modified by: @dyemanov

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

Target: 2.5 Alpha 1, 2.1.1 [ 10224, 10223 ]

Planning Status: Unspecified => Considered for inclusion

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@firebird-issue-importer firebird-issue-importer commented May 6, 2008

Modified by: @dyemanov

Fix Version: 2.5 Alpha 1 [ 10224 ]

Fix Version: 2.1.1 [ 10223 ]

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@firebird-issue-importer firebird-issue-importer commented May 6, 2008

Modified by: @dyemanov

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

Planning Status: Considered for inclusion => Included to release

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@firebird-issue-importer firebird-issue-importer commented May 6, 2008

Modified by: @dyemanov

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

resolution: Fixed [ 1 ]

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@firebird-issue-importer firebird-issue-importer commented Nov 18, 2008

Modified by: @pcisar

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

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@firebird-issue-importer firebird-issue-importer commented Jan 19, 2016

Modified by: @pavel-zotov

QA Status: No test

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