[#CORE-5597] Failing isc_que_events causes that other operations with DB on same handle are blocked

Firebird Core

Failing isc_que_events causes that other operations with DB on same handle are blocked

Created: 24/Aug/17 02:40 PM Updated: 26/Feb/18 03:54 PM

Component/s:

API / Client Library

Affects Version/s:

2.5.7

Fix Version/s:

None

Environment:

Windows, DelphiXE7, simplified (no thread) implementation of IBEvent

Issue Links:

Duplicate

This issue duplicates:

~~CORE-3718~~ Client Library Hangs after unsuccessful connection to remote auxiliary (events) port

QA Status:

No test

Description

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32 bits gds32.dll from 2.5.7
In case that connection to DB was successfully but auxiliary event connection failed to establish, other operations on same DB handle are blocked.

Call of isc_cancel_events not help.

If I use fbclient.dll from Firebird-3.0.3.32798-0_Win32, it is working fine.

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Vlad Khorsun added a comment - 16/Sep/17 06:47 AM

Could you provide us with reproducible test case ?

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Slavomir Skopalik added a comment - 17/Sep/17 09:32 AM

Test is simple:
1. Configure FB server but on firewall open only 3050. Block all other ports.
2. On client side connect to DB (this will be successful)
3. Try to register events. but this will failed due to server firewall.
4. After that, you cannot do any operation with DB using handle obtained in step 2.