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https://issues.apache.org/jira/browse/GUACAMOLE-1998?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17897884#comment-17897884
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Maik Tralles commented on GUACAMOLE-1998:
-----------------------------------------
[~mjumper]
I see the connection being closed by the client.
The server is still accessible outside of Guacamole. This behavior occurs with
multiple connections to a server *and* with multiple different servers. Every
time after ca. 60 cumulative connections.
sshd-Logs from server:
{code:java}
Nov 13 11:43:27 server sshd[171967]: Connection closed by 192.168.... port
60770 [preauth]
Nov 13 11:43:42 server sshd[171987]: Connection closed by 192.168.... port
60764 [preauth]
Nov 13 11:43:43 server sshd[171989]: Connection closed by 192.168.... port
60790 [preauth] {code}
corresponding guacd-Logs:
{code:java}
guacd_compose | guacd[1]: INFO: Creating new client for protocol "ssh"
guacd_compose | guacd[1]: INFO: Connection ID is
"$bca671b0-b1d4-4eee-bad0-7379ac931691"
guacd_compose | guacd[1581]: INFO: User
"@844ee84f-92f0-42bb-b90b-3f4fbfe88c9f" joined connection
"$bca671b0-b1d4-4eee-bad0-7379ac931691" (1 users now present)
guacd_compose | guacd[1581]: ERROR: SSH handshake failed.
guacd_compose | guacd[1581]: INFO: User
"@844ee84f-92f0-42bb-b90b-3f4fbfe88c9f" disconnected (0 users remain)
guacd_compose | guacd[1581]: INFO: Last user of connection
"$bca671b0-b1d4-4eee-bad0-7379ac931691" disconnected
guacd_compose | guacd[1]: INFO: Connection
"$bca671b0-b1d4-4eee-bad0-7379ac931691" removed.
guacd_compose | guacd[1]: INFO: Creating new client for protocol "ssh"
guacd_compose | guacd[1]: INFO: Connection ID is
"$5422b924-6066-4f56-b2d6-eaeafd2b53ef"
guacd_compose | guacd[1598]: INFO: User
"@2dd6c613-7ad8-4ac9-95e0-94bcd39bc4ff" joined connection
"$5422b924-6066-4f56-b2d6-eaeafd2b53ef" (1 users now present)
guacd_compose | guacd[1598]: ERROR: SSH handshake failed.
guacd_compose | guacd[1598]: INFO: User
"@2dd6c613-7ad8-4ac9-95e0-94bcd39bc4ff" disconnected (0 users remain)
guacd_compose | guacd[1598]: INFO: Last user of connection
"$5422b924-6066-4f56-b2d6-eaeafd2b53ef" disconnected
guacd_compose | guacd[1]: INFO: Connection
"$5422b924-6066-4f56-b2d6-eaeafd2b53ef" removed.
guacd_compose | guacd[1]: INFO: Creating new client for protocol "ssh"
guacd_compose | guacd[1]: INFO: Connection ID is
"$f58acc19-0c3e-43f8-9ee2-06264aac687a"
guacd_compose | guacd[1615]: INFO: User
"@a3951456-1f89-4677-9fd2-b66147149f2b" joined connection
"$f58acc19-0c3e-43f8-9ee2-06264aac687a" (1 users now present)
guacd_compose | guacd[1615]: ERROR: SSH handshake failed.
guacd_compose | guacd[1615]: INFO: User
"@a3951456-1f89-4677-9fd2-b66147149f2b" disconnected (0 users remain)
guacd_compose | guacd[1615]: INFO: Last user of connection
"$f58acc19-0c3e-43f8-9ee2-06264aac687a" disconnected
guacd_compose | guacd[1]: INFO: Connection
"$f58acc19-0c3e-43f8-9ee2-06264aac687a" removed.
{code}
> Cumulative number of connections are limited to about 60.
> ---------------------------------------------------------
>
> Key: GUACAMOLE-1998
> URL: https://issues.apache.org/jira/browse/GUACAMOLE-1998
> Project: Guacamole
> Issue Type: Bug
> Components: guacd
> Affects Versions: 1.5.5
> Environment: Version: 1.5.5 & latest from the official Dockerhub image
> Reporter: Maik Tralles
> Priority: Major
>
> When the cumulative number of connections reach about 60 user connections,
> new ones can't be created.
> Version: 1.5.5
> {code:java}
> guacd_compose | guacd[1645]: INFO: User
> "@9d098496-4861-4953-8d7f-0a6818f9943c" joined connection
> "$90ce76b4-1dcf-4f1e-9653-0d77d1b25318" (1 users now present)
> guacd_compose | guacd[1645]: ERROR: SSH handshake failed.
> guacd_compose | guacd[1645]: INFO: User
> "@9d098496-4861-4953-8d7f-0a6818f9943c" disconnected (0 users remain)
> guacd_compose | guacd[1645]: INFO: Last user of connection
> "$90ce76b4-1dcf-4f1e-9653-0d77d1b25318" disconnected{code}
> After about 60 connections, new ones can't be created.
>
> Latest (2024-11-04 12:00:00 UTC):
> {code:java}
> guacd_compose | guacd[1312]: INFO: User
> "@4267e072-2b24-4cf8-800a-63fd91ac36d8" joined connection
> "$223f505b-f6ca-4dc6-b346-53d6a4233833" (1 users now present)
> guacd_compose | GLib (gthread-posix.c): Unexpected error from C library
> during 'pthread_key_create': Resource temporarily unavailable. Aborting.
> guacd_compose | guacd[1]: INFO: Connection
> "$223f505b-f6ca-4dc6-b346-53d6a4233833" removed
> ...
> guacd_compose | guacd[1584]: INFO: User
> "@e963456d-3bac-4f97-ab1b-89e4845a5470" joined connection
> "$d4e67432-840c-42ba-82f1-68d5c0544d84" (1 users now present)
> guacd_compose | guacd[1584]: ERROR: SSH handshake failed.
> guacd_compose | guacd[1584]: INFO: User
> "@e963456d-3bac-4f97-ab1b-89e4845a5470" disconnected (0 users remain)
> guacd_compose | guacd[1584]: INFO: Last user of connection
> "$d4e67432-840c-42ba-82f1-68d5c0544d84" disconnected {code}
> After about 60 connections, the oldest connection will be closed to open the
> new connection.
> In the logs, we can see a similar issue mentioned in [GUACAMOLE-1920] When
> the cumulative number of user connections reaches a certain amount, guacd
> will report an error. "RDP server closed/refused connection: Security
> negotiation failed (wrong security type?)” - ASF JIRA
>
> Version 1.5.3 seems to work fine with >100 cumulative connections tested on
> the same environment.
>
> Affecting SSH + RDP.
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