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Installation & Configuration
Get help with installation and configuration of OWS. Please post specific bug reports, pull requests, or source code extensions on github.
Topics: 58

58 Topics

225 Posts

Last post Re: The JVM could not be star…
by rakeshjogi View the latest post
06 May 2026, 10:00
Features & Proposals
The place to exchange and discuss feature requests and proposals. Please post specific bug reports, pull requests, or source code extensions on github.
Topics: 10

10 Topics

35 Posts

Last post Re: Java 25 suggested
by Janak Mulani View the latest post
17 Feb 2026, 08:14

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Topics

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Last post

Openwebstart 1.9.1 ignores configured JDK

Last post by Janak Mulani « 26 Apr 2024, 10:50
Replies: 6
by beremour » 16 Apr 2024, 11:43

6 Replies

67825 Views

Last post by Janak Mulani
26 Apr 2024, 10:50
Fatal Read Error: Could not read or parse the JNLP file at

Last post by Janak Mulani « 12 Apr 2024, 10:18
Replies: 2
by JohannT » 12 Apr 2024, 08:53

2 Replies

35570 Views

Last post by Janak Mulani
12 Apr 2024, 10:18
macOS file path to the response.varfile

Last post by Janak Mulani « 08 Apr 2024, 20:38
Replies: 1
by bdarnell » 05 Apr 2024, 23:09

1 Replies

28532 Views

Last post by Janak Mulani
08 Apr 2024, 20:38
Desktop Integration Shortcut Handling

Last post by bdarnell « 05 Apr 2024, 23:00
Replies: 2
by lericksen@golden1.com » 31 Aug 2022, 18:24

2 Replies

35583 Views

Last post by bdarnell
05 Apr 2024, 23:00
Unknown Main-Class error

Last post by Janak Mulani « 04 Apr 2024, 14:49
Replies: 1
by Tim-GDL » 03 Apr 2024, 12:33

1 Replies

29403 Views

Last post by Janak Mulani
04 Apr 2024, 14:49
JAX-WS and openJDK 11

Last post by Janak Mulani « 19 Mar 2024, 12:01
Replies: 1
by plamas » 18 Mar 2024, 14:35

1 Replies

31695 Views

Last post by Janak Mulani
19 Mar 2024, 12:01
deployment.jvm.arguments.whitelist

Last post by Janak Mulani « 11 Mar 2024, 13:48
Replies: 1
by wolf » 11 Mar 2024, 11:02

1 Replies

31136 Views

Last post by Janak Mulani
11 Mar 2024, 13:48
using OWS without signed jars?

Last post by Janak Mulani « 11 Mar 2024, 06:30
Replies: 1
by gkatz » 07 Mar 2024, 17:31

1 Replies

31502 Views

Last post by Janak Mulani
11 Mar 2024, 06:30
OWS + Jdk17 - Denying permission

Last post by Janak Mulani « 29 Jan 2024, 06:49
Replies: 5
by oslodev » 14 Jun 2023, 15:10

5 Replies

47480 Views

Last post by Janak Mulani
29 Jan 2024, 06:49
Unable to run JNPL file after installation

Last post by Janak Mulani « 23 Jan 2024, 08:02
Replies: 1
by kokwei » 01 Sep 2022, 11:57

1 Replies

48040 Views

Last post by Janak Mulani
23 Jan 2024, 08:02
Unable to run JNLP file with OWS 1.9.0

Last post by Janak Mulani « 18 Dec 2023, 11:07
Replies: 8
by JaLe » 08 Dec 2023, 13:09

8 Replies

59758 Views

Last post by Janak Mulani
18 Dec 2023, 11:07
Jars are downloaded several times during application running (and it fails)

Last post by bfolleas « 14 Dec 2023, 18:00
Replies: 15
by bfolleas » 05 Apr 2023, 08:37

15 Replies

147742 Views

Last post by bfolleas
14 Dec 2023, 18:00
JNLP IBM IMM and Java 21

Last post by Janak Mulani « 13 Dec 2023, 05:52
Replies: 1
by beremour » 12 Dec 2023, 14:19

1 Replies

33723 Views

Last post by Janak Mulani
13 Dec 2023, 05:52
openwebstart not reading certificates from CAC reader

Last post by Janak Mulani « 13 Dec 2023, 04:38
Replies: 3
by channareddy » 11 Dec 2023, 19:07

3 Replies

39458 Views

Last post by Janak Mulani
13 Dec 2023, 04:38
App not starting with Java21 - JarIndex not found

Last post by bfolleas « 08 Dec 2023, 13:58
Replies: 11
by mredeker » 19 Oct 2023, 15:57

11 Replies

90289 Views

Last post by bfolleas
08 Dec 2023, 13:58
Digital Signature Warning Even With Settings

Last post by Janak Mulani « 07 Dec 2023, 07:51
Replies: 3
by PWn3R » 06 Dec 2023, 20:48

3 Replies

39970 Views

Last post by Janak Mulani
07 Dec 2023, 07:51
OpenWebstart on Mac OSX and Temurin17; --add-exports Problem

Last post by mredeker « 05 Dec 2023, 08:53
Replies: 10
by mredeker » 01 Aug 2023, 10:38

10 Replies

70319 Views

Last post by mredeker
05 Dec 2023, 08:53
Memory consumption in log mechanism

Last post by Janak Mulani « 23 Nov 2023, 08:08
Replies: 2
by gkatz » 22 Nov 2023, 15:20

2 Replies

40002 Views

Last post by Janak Mulani
23 Nov 2023, 08:08
The version of the JVM must be 1.8?

Last post by Andreas Ehret « 27 Oct 2023, 14:14
Replies: 4
by cliviu » 25 Oct 2023, 10:08

4 Replies

33176 Views

Last post by Andreas Ehret
27 Oct 2023, 14:14
UnsatisfiedLinkError: wrong ELF class

Last post by jelabarre59 « 26 Oct 2023, 18:21
Replies: 2
by jelabarre59 » 24 Oct 2023, 20:37

2 Replies

28688 Views

Last post by jelabarre59
26 Oct 2023, 18:21
CacheKey with session Id mandatory?

Last post by Janak Mulani « 03 Oct 2023, 14:23
Replies: 7
by Olivier » 28 Sep 2023, 11:59

7 Replies

40120 Views

Last post by Janak Mulani
03 Oct 2023, 14:23
[Solved] JNLPClassLoader finds the same resource twice when using jnlp extension

Last post by Janak Mulani « 28 Sep 2023, 11:32
Replies: 8
by msc » 03 Aug 2023, 15:58

8 Replies

30782 Views

Last post by Janak Mulani
28 Sep 2023, 11:32
Application Error: The signed JNLP file did not match the launching JNLP file.

Last post by Janak Mulani « 30 Jun 2023, 17:30
Replies: 2
by KlausFriese » 08 Jun 2023, 16:07

2 Replies

23676 Views

Last post by Janak Mulani
30 Jun 2023, 17:30
[Solved} Problem with JNLP caching in OpenWebStart

Last post by Janak Mulani « 27 Jun 2023, 16:11
Replies: 12
by msc » 09 Dec 2021, 11:12

12 Replies

54346 Views

Last post by Janak Mulani
27 Jun 2023, 16:11
unable to launch jnlp File - Fatal: Read Error: Could not read or parse the JNLP file

Last post by Janak Mulani « 26 Apr 2023, 09:10
Replies: 11
by hacklhar » 15 Jun 2022, 09:01

11 Replies

48670 Views

Last post by Janak Mulani
26 Apr 2023, 09:10
Launch Error: Could not launch JNLP file

Last post by Janak Mulani « 26 Apr 2023, 08:38
Replies: 3
by thomas.trippmacher » 17 Apr 2023, 14:12

3 Replies

29974 Views

Last post by Janak Mulani
26 Apr 2023, 08:38
Implement OAuth2.0 for java WebStart applications

Last post by Mhussain « 12 Apr 2023, 09:35

by Mhussain » 12 Apr 2023, 09:35

0 Replies

69255 Views

Last post by Mhussain
12 Apr 2023, 09:35
Application not launching - looks like looping behavior

Last post by magnusska « 11 Apr 2023, 13:00
Replies: 26
by magnusska » 02 Mar 2023, 12:40
1

2
26 Replies

92140 Views

Last post by magnusska
11 Apr 2023, 13:00
Slow startup - many jars

Last post by Janak Mulani « 31 Mar 2023, 13:21
Replies: 10
by sg431 » 31 Mar 2022, 13:58

10 Replies

36424 Views

Last post by Janak Mulani
31 Mar 2023, 13:21
OpenWebStart as Java 8

Last post by walcker « 29 Mar 2023, 14:16
Replies: 2
by walcker » 19 Mar 2023, 14:07

2 Replies

22209 Views

Last post by walcker
29 Mar 2023, 14:16
FilePermission issue with OWS and RHEL8

Last post by danmoser « 15 Mar 2023, 21:48
Replies: 4
by danmoser » 09 Mar 2023, 16:33

4 Replies

25730 Views

Last post by danmoser
15 Mar 2023, 21:48
Javaagent

Last post by Janak Mulani « 08 Mar 2023, 19:06
Replies: 1
by Andrej » 03 Mar 2023, 11:31

1 Replies

22266 Views

Last post by Janak Mulani
08 Mar 2023, 19:06
java.sql.date ClassNotFound when lauching the client

Last post by Janak Mulani « 22 Feb 2023, 15:08
Replies: 11
by oslodev » 03 Jan 2023, 11:15

11 Replies

36429 Views

Last post by Janak Mulani
22 Feb 2023, 15:08
Authoriztion not synchronized.

Last post by Janak Mulani « 06 Dec 2022, 08:50
Replies: 1
by Tyler Hembree » 02 Dec 2022, 15:17

1 Replies

20731 Views

Last post by Janak Mulani
06 Dec 2022, 08:50
Java 17

Last post by Janak Mulani « 25 Nov 2022, 10:53
Replies: 7
by DaveRadtke » 28 Sep 2022, 00:07

7 Replies

33368 Views

Last post by Janak Mulani
25 Nov 2022, 10:53
Could not read or parse the JNLP file

Last post by AmitBhardwaj « 14 Nov 2022, 16:17
Replies: 4
by AmitBhardwaj » 07 Nov 2022, 11:06

4 Replies

26226 Views

Last post by AmitBhardwaj
14 Nov 2022, 16:17
How can I run a JavaFX application from a remote PC?

Last post by TetsutoShikishima « 05 Nov 2022, 11:10
Replies: 6
by TetsutoShikishima » 18 Oct 2022, 15:50

6 Replies

27696 Views

Last post by TetsutoShikishima
05 Nov 2022, 11:10
Start an e4-RCP application using OWS

Last post by Andreas Ehret « 19 Sep 2022, 15:50
Replies: 1
by armin » 19 Sep 2022, 13:20

1 Replies

22130 Views

Last post by Andreas Ehret
19 Sep 2022, 15:50
Spring Boot and Openwebstart

Last post by Janak Mulani « 14 Sep 2022, 12:20
Replies: 1
by sg431 » 09 Sep 2022, 15:11

1 Replies

20318 Views

Last post by Janak Mulani
14 Sep 2022, 12:20
How to Suppress Security Approval's digital signature.

Last post by Janak Mulani « 30 Aug 2022, 08:00
Replies: 1
by lericksen@golden1.com » 29 Aug 2022, 20:04

1 Replies

17916 Views

Last post by Janak Mulani
30 Aug 2022, 08:00
Could not able to install OpenWebStart in RHEL8.5 OS

Last post by Ashok « 17 Aug 2022, 15:20
Replies: 1
by Ashok » 02 Aug 2022, 18:49

1 Replies

18555 Views

Last post by Ashok
17 Aug 2022, 15:20
jnlp is not signed

Last post by Janak Mulani « 16 Aug 2022, 04:14
Replies: 1
by gusingh » 10 Aug 2022, 22:00

1 Replies

19084 Views

Last post by Janak Mulani
16 Aug 2022, 04:14
netx: Initialization Error: Could not initialize application.

Last post by Janak Mulani « 16 Aug 2022, 03:58
Replies: 6
by Ashok » 02 Aug 2022, 19:38

6 Replies

28997 Views

Last post by Janak Mulani
16 Aug 2022, 03:58
Include a JAR file in the CLASSPATH

Last post by Janak Mulani « 09 Aug 2022, 11:18
Replies: 1
by jmcallister » 03 Aug 2022, 17:06

1 Replies

19710 Views

Last post by Janak Mulani
09 Aug 2022, 11:18
Error while launching OWS from another User

Last post by Janak Mulani « 06 Aug 2022, 09:18
Replies: 3
by Ashok » 09 Jun 2022, 21:06

3 Replies

20971 Views

Last post by Janak Mulani
06 Aug 2022, 09:18
Exception in thread "AWT-EventQueue-0" java.awt.HeadlessException:

Last post by Janak Mulani « 04 Aug 2022, 07:17
Replies: 1
by Ashok » 03 Aug 2022, 09:45

1 Replies

18984 Views

Last post by Janak Mulani
04 Aug 2022, 07:17
com.apple.eawt.AboutHandler class not found

Last post by Janak Mulani « 02 Aug 2022, 07:36
Replies: 1
by jmcallister » 01 Aug 2022, 19:26

1 Replies

17509 Views

Last post by Janak Mulani
02 Aug 2022, 07:36
problem with log4j2

Last post by hilalkale « 28 Jul 2022, 09:43
Replies: 14
by KlausFriese » 27 Jan 2022, 11:14

14 Replies

53353 Views

Last post by hilalkale
28 Jul 2022, 09:43
Blank/empty window on RHEL9 w/ OpenWebStart 1.6.0

Last post by portom « 21 Jul 2022, 13:46
Replies: 5
by portom » 06 Jul 2022, 11:19

5 Replies

20554 Views

Last post by portom
21 Jul 2022, 13:46
JNLP Injection Exploit?

Last post by Janak Mulani « 07 Jul 2022, 14:17
Replies: 1
by Bill_V » 29 Jun 2022, 22:05

1 Replies

11835 Views

Last post by Janak Mulani
07 Jul 2022, 14:17

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