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https://issues.apache.org/jira/browse/GUACAMOLE-2183?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18044148#comment-18044148
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Klaus Fuerstberger edited comment on GUACAMOLE-2183 at 12/10/25 2:24 PM:
-------------------------------------------------------------------------
[~vnick] Thank you for your advice.
Thanks for the workaround. However, it is difficult as I would have to process
370 connections here. I could only do this directly in the database.
Here is the guacd log for the same period:
{code:java}
Dez 04 12:57:25 legsvas201 guacd[27988]: Creating new client for protocol "vnc"
Dez 04 12:57:25 legsvas201 guacd[27988]: guacd[27988]: INFO: Creating
new client for protocol "vnc"
Dez 04 12:57:25 legsvas201 guacd[27988]: Connection ID is
"$4e4e4fcc-0090-46e9-990a-c73027b0a675"
Dez 04 12:57:25 legsvas201 guacd[27988]: guacd[27988]: INFO: Connection
ID is "$4e4e4fcc-0090-46e9-990a-c73027b0a
675"
Dez 04 12:57:25 legsvas201 guacd[3913208]: Cursor rendering: local
Dez 04 12:57:25 legsvas201 guacd[3913208]: guacd[3913208]: INFO: Cursor
rendering: local
Dez 04 12:57:25 legsvas201 guacd[3913208]: The libvncclient library does not
support remote resize.
Dez 04 12:57:25 legsvas201 guacd[3913208]: guacd[3913208]: WARNING: The
libvncclient library does not support remote resize.
Dez 04 12:57:25 legsvas201 guacd[3913208]: User
"@a9968cf8-14d5-4ae1-847d-6c12c50b2343" joined connection
"$4e4e4fcc-0090-46e9-990a-c73027b0a675" (1 users now present)
Dez 04 12:57:25 legsvas201 guacd[3913208]: guacd[3913208]: INFO: User
"@a9968cf8-14d5-4ae1-847d-6c12c50b2343" joined connection
"$4e4e4fcc-0090-46e9-990a-c73027b0a675" (1 users now present)
Dez 04 12:57:25 legsvas201 guacd[3913208]: VNC server supports protocol version
3.8 (viewer 3.8)
Dez 04 12:57:25 legsvas201 guacd[3913208]: We have 2 security types to read
Dez 04 12:57:25 legsvas201 guacd[3913208]: 0) Received security type 2
Dez 04 12:57:25 legsvas201 guacd[3913208]: Selecting security type 2 (0/2 in
the list)
Dez 04 12:57:25 legsvas201 guacd[3913208]: 1) Received security type 16
Dez 04 12:57:25 legsvas201 guacd[3913208]: Selected Security Scheme 2
Dez 04 12:57:25 legsvas201 guacd[3913208]: Libgcrypt warning: missing
initialization - please fix the application
Dez 04 12:57:29 legsvas201 guacd[27988]: Creating new client for protocol "vnc"
Dez 04 12:57:29 legsvas201 guacd[27988]: guacd[27988]: INFO: Creating
new client for protocol "vnc"
Dez 04 12:57:29 legsvas201 guacd[27988]: guacd[27988]: INFO: Connection
ID is "$ae9ade09-ea70-487c-9d3a-8e495f6fa71a"
Dez 04 12:57:29 legsvas201 guacd[27988]: Connection ID is
"$ae9ade09-ea70-487c-9d3a-8e495f6fa71a"
Dez 04 12:57:29 legsvas201 guacd[3913218]: Cursor rendering: local
Dez 04 12:57:29 legsvas201 guacd[3913218]: guacd[3913218]: INFO: Cursor
rendering: local
Dez 04 12:57:29 legsvas201 guacd[3913218]: The libvncclient library does not
support remote resize.
Dez 04 12:57:29 legsvas201 guacd[3913218]: guacd[3913218]: WARNING: The
libvncclient library does not support remote resize.
Dez 04 12:57:29 legsvas201 guacd[3913218]: User
"@43eff8c0-887f-4325-99c8-ade7386a6fc9" joined connection
"$ae9ade09-ea70-487c-9d3a-8e495f6fa71a" (1 users now present)
Dez 04 12:57:29 legsvas201 guacd[3913218]: guacd[3913218]: INFO: User
"@43eff8c0-887f-4325-99c8-ade7386a6fc9" joined connection
"$ae9ade09-ea70-487c-9d3a-8e495f6fa71a" (1 users now present)
Dez 04 12:57:29 legsvas201 guacd[3913218]: VNC server supports protocol version
3.8 (viewer 3.8)
Dez 04 12:57:29 legsvas201 guacd[3913218]: We have 2 security types to read
Dez 04 12:57:29 legsvas201 guacd[3913218]: 0) Received security type 2
Dez 04 12:57:29 legsvas201 guacd[3913218]: Selecting security type 2 (0/2 in
the list)
Dez 04 12:57:29 legsvas201 guacd[3913218]: 1) Received security type 16
Dez 04 12:57:29 legsvas201 guacd[3913218]: Selected Security Scheme 2
Dez 04 12:57:29 legsvas201 guacd[27988]: Creating new client for protocol "vnc"
Dez 04 12:57:29 legsvas201 guacd[27988]: guacd[27988]: INFO: Creating
new client for protocol "vnc"
Dez 04 12:57:29 legsvas201 guacd[27988]: Connection ID is
"$178b76e5-3204-4559-af8a-48aec78f862f"
Dez 04 12:57:29 legsvas201 guacd[27988]: guacd[27988]: INFO: Connection
ID is "$178b76e5-3204-4559-af8a-48aec78f862f"
Dez 04 12:57:29 legsvas201 guacd[3913228]: Cursor rendering: local
Dez 04 12:57:29 legsvas201 guacd[3913228]: The libvncclient library does not
support remote resize.
Dez 04 12:57:29 legsvas201 guacd[3913228]: guacd[3913228]: INFO: Cursor
rendering: local
Dez 04 12:57:29 legsvas201 guacd[3913228]: guacd[3913228]: WARNING: The
libvncclient library does not support remote resize.
Dez 04 12:57:29 legsvas201 guacd[3913228]: guacd[3913228]: INFO: User
"@6dc04964-9366-4c30-9138-514b6ae4afc4" joined connection
"$178b76e5-3204-4559-af8a-48aec78f862f" (1 users now present)
Dez 04 12:57:29 legsvas201 guacd[3913228]: User
"@6dc04964-9366-4c30-9138-514b6ae4afc4" joined connection
"$178b76e5-3204-4559-af8a-48aec78f862f" (1 users now present)
Dez 04 12:57:29 legsvas201 guacd[3913218]: Libgcrypt warning: missing
initialization - please fix the application
Dez 04 12:57:29 legsvas201 guacd[3913228]: VNC server supports protocol version
3.8 (viewer 3.8)
Dez 04 12:57:29 legsvas201 guacd[3913228]: We have 2 security types to read
Dez 04 12:57:29 legsvas201 guacd[3913228]: 0) Received security type 2
Dez 04 12:57:29 legsvas201 guacd[3913228]: Selecting security type 2 (0/2 in
the list)
Dez 04 12:57:29 legsvas201 guacd[3913228]: 1) Received security type 16
Dez 04 12:57:29 legsvas201 guacd[3913228]: Selected Security Scheme 2
Dez 04 12:57:29 legsvas201 guacd[3913228]: Libgcrypt warning: missing
initialization - please fix the application
Dez 04 12:57:29 legsvas201 guacd[27988]: Creating new client for protocol "vnc"
Dez 04 12:57:29 legsvas201 guacd[27988]: guacd[27988]: INFO: Creating
new client for protocol "vnc"
Dez 04 12:57:29 legsvas201 guacd[27988]: Connection ID is
"$2edeba54-7df1-41c5-88b9-845d2b1e8862"
Dez 04 12:57:29 legsvas201 guacd[27988]: guacd[27988]: INFO: Connection
ID is "$2edeba54-7df1-41c5-88b9-845d2b1e8862"
Dez 04 12:57:29 legsvas201 guacd[3913238]: Cursor rendering: local
Dez 04 12:57:29 legsvas201 guacd[3913238]: The libvncclient library does not
support remote resize.
Dez 04 12:57:29 legsvas201 guacd[3913238]: guacd[3913238]: INFO: Cursor
rendering: local
Dez 04 12:57:29 legsvas201 guacd[3913238]: guacd[3913238]: WARNING: The
libvncclient library does not support remote resize.
Dez 04 12:57:29 legsvas201 guacd[3913238]: guacd[3913238]: INFO: User
"@1ee58533-9880-4c21-b487-28eb3dcc548c" joined connection
"$2edeba54-7df1-41c5-88b9-845d2b1e8862" (1 users now present)
Dez 04 12:57:29 legsvas201 guacd[3913238]: User
"@1ee58533-9880-4c21-b487-28eb3dcc548c" joined connection
"$2edeba54-7df1-41c5-88b9-845d2b1e8862" (1 users now present)
Dez 04 12:57:29 legsvas201 guacd[3913238]: VNC server supports protocol version
3.8 (viewer 3.8)
Dez 04 12:57:29 legsvas201 guacd[3913238]: We have 2 security types to read
Dez 04 12:57:29 legsvas201 guacd[3913238]: 0) Received security type 2
Dez 04 12:57:29 legsvas201 guacd[3913238]: Selecting security type 2 (0/2 in
the list)
Dez 04 12:57:29 legsvas201 guacd[3913238]: 1) Received security type 16
Dez 04 12:57:29 legsvas201 guacd[3913238]: Selected Security Scheme 2
...
{code}
I would be pleased if there is already a fix here.
was (Author: JIRAUSER311802):
[~vnick] Thank you for your advice.
Thanks for the workaround. However, it is difficult as I would have to process
370 connections here. I could only do this directly in the database.
Here is the guacd log for the same period:
{code:java}
Dez 04 12:57:25 legsvas201 guacd[27988]: Creating new client for protocol "vnc"
Dez 04 12:57:25 legsvas201 guacd[27988]: guacd[27988]: INFO: Creating
new client for protocol "vnc"
Dez 04 12:57:25 legsvas201 guacd[27988]: Connection ID is
"$4e4e4fcc-0090-46e9-990a-c73027b0a675"
Dez 04 12:57:25 legsvas201 guacd[27988]: guacd[27988]: INFO: Connection
ID is "$4e4e4fcc-0090-46e9-990a-c73027b0>
Dez 04 12:57:25 legsvas201 guacd[3913208]: Cursor rendering: local
Dez 04 12:57:25 legsvas201 guacd[3913208]: guacd[3913208]: INFO: Cursor
rendering: local
Dez 04 12:57:25 legsvas201 guacd[3913208]: The libvncclient library does not
support remote resize.
Dez 04 12:57:25 legsvas201 guacd[3913208]: guacd[3913208]: WARNING: The
libvncclient library does not support re>
Dez 04 12:57:25 legsvas201 guacd[3913208]: User
"@a9968cf8-14d5-4ae1-847d-6c12c50b2343" joined connection "$4e4e4fcc-00>
Dez 04 12:57:25 legsvas201 guacd[3913208]: guacd[3913208]: INFO: User
"@a9968cf8-14d5-4ae1-847d-6c12c50b2343" jo>
Dez 04 12:57:25 legsvas201 guacd[3913208]: VNC server supports protocol version
3.8 (viewer 3.8)
Dez 04 12:57:25 legsvas201 guacd[3913208]: We have 2 security types to read
Dez 04 12:57:25 legsvas201 guacd[3913208]: 0) Received security type 2
Dez 04 12:57:25 legsvas201 guacd[3913208]: Selecting security type 2 (0/2 in
the list)
Dez 04 12:57:25 legsvas201 guacd[3913208]: 1) Received security type 16
Dez 04 12:57:25 legsvas201 guacd[3913208]: Selected Security Scheme 2
Dez 04 12:57:25 legsvas201 guacd[3913208]: Libgcrypt warning: missing
initialization - please fix the application
Dez 04 12:57:29 legsvas201 guacd[27988]: Creating new client for protocol "vnc"
Dez 04 12:57:29 legsvas201 guacd[27988]: guacd[27988]: INFO: Creating
new client for protocol "vnc"
Dez 04 12:57:29 legsvas201 guacd[27988]: guacd[27988]: INFO: Connection
ID is "$ae9ade09-ea70-487c-9d3a-8e495f6f>
Dez 04 12:57:29 legsvas201 guacd[27988]: Connection ID is
"$ae9ade09-ea70-487c-9d3a-8e495f6fa71a"
Dez 04 12:57:29 legsvas201 guacd[3913218]: Cursor rendering: local
Dez 04 12:57:29 legsvas201 guacd[3913218]: guacd[3913218]: INFO: Cursor
rendering: local
Dez 04 12:57:29 legsvas201 guacd[3913218]: The libvncclient library does not
support remote resize.
Dez 04 12:57:29 legsvas201 guacd[3913218]: guacd[3913218]: WARNING: The
libvncclient library does not support re>
Dez 04 12:57:29 legsvas201 guacd[3913218]: User
"@43eff8c0-887f-4325-99c8-ade7386a6fc9" joined connection "$ae9ade09-ea>
Dez 04 12:57:29 legsvas201 guacd[3913218]: guacd[3913218]: INFO: User
"@43eff8c0-887f-4325-99c8-ade7386a6fc9" jo>
Dez 04 12:57:29 legsvas201 guacd[3913218]: VNC server supports protocol version
3.8 (viewer 3.8)
Dez 04 12:57:29 legsvas201 guacd[3913218]: We have 2 security types to read
Dez 04 12:57:29 legsvas201 guacd[3913218]: 0) Received security type 2
Dez 04 12:57:29 legsvas201 guacd[3913218]: Selecting security type 2 (0/2 in
the list)
Dez 04 12:57:29 legsvas201 guacd[3913218]: 1) Received security type 16
Dez 04 12:57:29 legsvas201 guacd[3913218]: Selected Security Scheme 2
Dez 04 12:57:29 legsvas201 guacd[27988]: Creating new client for protocol "vnc"
Dez 04 12:57:29 legsvas201 guacd[27988]: guacd[27988]: INFO: Creating
new client for protocol "vnc"
Dez 04 12:57:29 legsvas201 guacd[27988]: Connection ID is
"$178b76e5-3204-4559-af8a-48aec78f862f"
Dez 04 12:57:29 legsvas201 guacd[27988]: guacd[27988]: INFO: Connection
ID is "$178b76e5-3204-4559-af8a-48aec78f>
Dez 04 12:57:29 legsvas201 guacd[3913228]: Cursor rendering: local
Dez 04 12:57:29 legsvas201 guacd[3913228]: The libvncclient library does not
support remote resize.
Dez 04 12:57:29 legsvas201 guacd[3913228]: guacd[3913228]: INFO: Cursor
rendering: local
Dez 04 12:57:29 legsvas201 guacd[3913228]: guacd[3913228]: WARNING: The
libvncclient library does not support re>
Dez 04 12:57:29 legsvas201 guacd[3913228]: guacd[3913228]: INFO: User
"@6dc04964-9366-4c30-9138-514b6ae4afc4" jo>
Dez 04 12:57:29 legsvas201 guacd[3913228]: User
"@6dc04964-9366-4c30-9138-514b6ae4afc4" joined connection "$178b76e5-32>
Dez 04 12:57:29 legsvas201 guacd[3913218]: Libgcrypt warning: missing
initialization - please fix the application
Dez 04 12:57:29 legsvas201 guacd[3913228]: VNC server supports protocol version
3.8 (viewer 3.8)
Dez 04 12:57:29 legsvas201 guacd[3913228]: We have 2 security types to read
Dez 04 12:57:29 legsvas201 guacd[3913228]: 0) Received security type 2
Dez 04 12:57:29 legsvas201 guacd[3913228]: Selecting security type 2 (0/2 in
the list)
Dez 04 12:57:29 legsvas201 guacd[3913228]: 1) Received security type 16
Dez 04 12:57:29 legsvas201 guacd[3913228]: Selected Security Scheme 2
Dez 04 12:57:29 legsvas201 guacd[3913228]: Libgcrypt warning: missing
initialization - please fix the application
Dez 04 12:57:29 legsvas201 guacd[27988]: Creating new client for protocol "vnc"
Dez 04 12:57:29 legsvas201 guacd[27988]: guacd[27988]: INFO: Creating
new client for protocol "vnc"
Dez 04 12:57:29 legsvas201 guacd[27988]: Connection ID is
"$2edeba54-7df1-41c5-88b9-845d2b1e8862"
Dez 04 12:57:29 legsvas201 guacd[27988]: guacd[27988]: INFO: Connection
ID is "$2edeba54-7df1-41c5-88b9-845d2b1e>
Dez 04 12:57:29 legsvas201 guacd[3913238]: Cursor rendering: local
Dez 04 12:57:29 legsvas201 guacd[3913238]: The libvncclient library does not
support remote resize.
Dez 04 12:57:29 legsvas201 guacd[3913238]: guacd[3913238]: INFO: Cursor
rendering: local
Dez 04 12:57:29 legsvas201 guacd[3913238]: guacd[3913238]: WARNING: The
libvncclient library does not support re>
Dez 04 12:57:29 legsvas201 guacd[3913238]: guacd[3913238]: INFO: User
"@1ee58533-9880-4c21-b487-28eb3dcc548c" jo>
Dez 04 12:57:29 legsvas201 guacd[3913238]: User
"@1ee58533-9880-4c21-b487-28eb3dcc548c" joined connection "$2edeba54-7d>
Dez 04 12:57:29 legsvas201 guacd[3913238]: VNC server supports protocol version
3.8 (viewer 3.8)
Dez 04 12:57:29 legsvas201 guacd[3913238]: We have 2 security types to read
Dez 04 12:57:29 legsvas201 guacd[3913238]: 0) Received security type 2
Dez 04 12:57:29 legsvas201 guacd[3913238]: Selecting security type 2 (0/2 in
the list)
Dez 04 12:57:29 legsvas201 guacd[3913238]: 1) Received security type 16
Dez 04 12:57:29 legsvas201 guacd[3913238]: Selected Security Scheme 2
... {code}
I would be pleased if there is already a fix here.
> guacd crashes when you move or resize the browser window
> --------------------------------------------------------
>
> Key: GUACAMOLE-2183
> URL: https://issues.apache.org/jira/browse/GUACAMOLE-2183
> Project: Guacamole
> Issue Type: Bug
> Components: guacd
> Affects Versions: 1.6.0
> Environment: Ubuntu 22.04.5 LTS
> Reporter: Klaus Fuerstberger
> Priority: Minor
>
> The client is connected via Guacamole VNC via ThightVNC. No special settings
> were made in the connection.
> 3 monitors are connected to the target host.
> As soon as the client moves the browser window after connecting or changes
> the size, an extremely large number of connection attempts are made in a
> single second. If you continue like this, guacd will crash at some point.
> The following is logged in catalina.out:
> {code:java}
> [2025-12-04 12:53:44] [info] 12:53:44.777 [http-nio-127.0.0.1-8080-exec-6]
> INFO o.a.g.tunnel.TunnelRequestService - Use
> r "cobwah2" connected to connection "499".
> [2025-12-04 12:57:25] [info] 12:57:25.629 [http-nio-127.0.0.1-8080-exec-3]
> INFO o.a.g.tunnel.TunnelRequestService - Use
> r "cobwah2" connected to connection "499".
> [2025-12-04 12:57:29] [info] 12:57:29.071 [http-nio-127.0.0.1-8080-exec-5]
> INFO o.a.g.tunnel.TunnelRequestService - Use
> r "cobwah2" connected to connection "499".
> [2025-12-04 12:57:29] [info] 12:57:29.156 [http-nio-127.0.0.1-8080-exec-7]
> INFO o.a.g.tunnel.TunnelRequestService - User "cobwah2" connected to
> connection "499".
> [2025-12-04 12:57:29] [info] 12:57:29.248 [http-nio-127.0.0.1-8080-exec-1]
> INFO o.a.g.tunnel.TunnelRequestService - User "cobwah2" connected to
> connection "499".
> [2025-12-04 12:57:29] [info] 12:57:29.296 [http-nio-127.0.0.1-8080-exec-8]
> INFO o.a.g.tunnel.TunnelRequestService - User "cobwah2" connected to
> connection "499".
> [2025-12-04 12:57:29] [info] 12:57:29.354 [http-nio-127.0.0.1-8080-exec-9]
> INFO o.a.g.tunnel.TunnelRequestService - User "cobwah2" connected to
> connection "499".
> [2025-12-04 12:57:29] [info] 12:57:29.422 [http-nio-127.0.0.1-8080-exec-1]
> INFO o.a.g.tunnel.TunnelRequestService - User "cobwah2" connected to
> connection "499".
> ...{code}
>
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