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https://jira.jboss.org/jira/browse/JBREM-949?page=com.atlassian.jira.plug...
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mingjun jiang commented on JBREM-949:
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Accoring to this JIRA, It seems that this bug was fixed in 2.2.2 SP8. However, in
https://jira.jboss.org/jira/browse/JBREM-947, it is said that this bug was fixed in
Remoting 2.4.0. I am quite confused. Now, we encountered the similar problem when we are
using 2.2.3 SP1.
The bisocket connection won't be closed if pulling out the ethernet cable between
client and server. It seems that the failure detection program won't close the failure
connection, as a result, the subsequent requests will hang after connection account
exceeds the threshold (MaxPoolSize).
I had opened a JIRA issue to report this problem:
https://jira.jboss.org/jira/browse/JBREM-1169, please refer to this JIRA link for more
details
So, I am adding such comments to seek your expertise, thanks
CLONE [JBREM-947] - ConnectionValidator hangs when server dies
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Key: JBREM-949
URL:
https://jira.jboss.org/jira/browse/JBREM-949
Project: JBoss Remoting
Issue Type: Bug
Security Level: Public(Everyone can see)
Affects Versions: 2.2.2.SP7
Reporter: Tim Fox
Assignee: Ron Sigal (old account)
Fix For: 2.2.2.SP8
If the connection between client and server is pulled (pull the real cable) or the entire
server suddenly dies, then the connection won't be closed from the server (unlike a
kill -9 of the server where the OS will terminate that processses connections), so the
client making the write() or read() on the socket won't receive an exception.
In the eyes of TCP the connection is still alive and the read/write will block until the
socket timeout is reached.
Typically the socket timeout will be much higher than the desired failure detection time
(the validation interval), but currently failure will never be detected in this situation
before the socket timeout time.
Remoting should not be dependent on the socket timeout for failure detection, the
connetion validation and socket timeout should be possible to be configured separately.
E.g. you might want to configure a socket timeout of 60 seconds, but a connection
validation frequency (ping) of 5 seconds. Currently this is not possible.
The current implementation gives inconsistent behaviour depending on how the server died
- i.e. whether the process died (e.g. kill -9) or the cable was pulled or the entire
server disappeared.
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