Java Client Error: "Unable To Launch The Application", The Exception Reads: "Found unsigned entry in resource. " (Doc ID 1595757.1)
When attempting to launch the Java Client the user gets the pop up message with below error:
Error: Unable to launch the application, the following error is found if you check the details of this error by clicking on the exception tab.
com.sun.deploy.net.JARSigningException: Found unsigned entry in resource: http://<server_name:port>/JavaClient/lib/jagile/saaj.jar
at com.sun.javaws.security.SigningInfo.getCommonCodeSignersForJar(Unknown Source)
at com.sun.javaws.security.SigningInfo.check(Unknown Source)
at com.sun.javaws.LaunchDownload.checkSignedResourcesHelper(Unknown Source)
at com.sun.javaws.LaunchDownload.checkSignedResources(Unknown Source)
at com.sun.javaws.Launcher.prepareResources(Unknown Source)
at com.sun.javaws.Launcher.prepareAllResources(Unknown Source)
at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source)
at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source)
at com.sun.javaws.Launcher.launch(Unknown Source)
at com.sun.javaws.Main.launchApp(Unknown Source)
at com.sun.javaws.Main.continueInSecureThread(Unknown Source)
at com.sun.javaws.Main$1.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Steps to Reproduce
- Open Java Control Panel
- From General tab, goto Settings
- Delete Files
- Check ‘Trace and Log Files’ and ‘Cached Applications and Applets’, and OK
- Remove check from ‘Keep temporary files on my computer.’ and OK
- Apply
- Access to Java Client URL: http://appserver:7001/JavaClient/start.html
- Launch
Cause
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Java error : Unable to launch the application when trying to open up DELL iDRAC console !
I updated java on my machine today since one of the web application demanded the update. Post java update, the web application started working (sigh). I was happy that, I don’t have to deal with java again.
After a while, for some maintenance activity, I connected DELL iDRAC ( Integrated Dell Remote Access Controller ) through web browser and wanted to access remote console.
Viola ! an error popped up saying ” Unable to launch the application.” Wow, Another java problem ! Java at its best ! ��
I tried to delete java ‘trace and log files’ and ‘Cached Applications and Applets’ from java control panel but in vain.
I even removed and re-installed java but in vain.
What finally saved my day was, changing ‘Network Settings’ in java control panel.
Instead of ‘Use browser settings’, I selected ‘Direct Connection’. Bingo ! when I reinitiated remote console access, it worked like a charm ��
Java unable to launch the application
Для тех, у кого так же, как у меня, некоторое время назад перестали запускаться консоли Java ip-KVM к серверам, JViewer — Unable to launch the application.
В подробностях ошибка:
Unsigned application requesting unrestricted access to system
The following resource is signed with a weak signature algorithm MD5withRSA and is threated as unsigned: http://x.x.x.x:80/Java/release/JViewer.jar
Происходит такое после обновления Java. Начиная с Update 131 (JDK 8u131), MD5 по умолчанию добавлен в список отключенных — jdk.jar.disabledAlgorithms.
Ждать, когда производители серверных материнских плат обновят прошивки BMC/IPMI не вариант. Во-первых, KVM нужен сейчас, во-вторых, для старых серверов так вообще ждать бессмысленно.
Обходное решение: найти на компьютере, с которого надо подключиться, в расположении файлов Java файл java.security (в lib/security, в JDK 9 будет располагаться в conf/security) и отредактировать одну строку.
Убрать из неё MD5 или вообще закомментировать.
- 6 февраля
После обновления прошивки сервера Supermicro перестала запускаться java-консоль KVM.
Приложение падало с ошибкой:
Unable to launch the application
Действительно, есть пустой аргумент:
Решение проблемы
В пустой первый аргумент копируем адрес вашего сервера из четвёртого аргумента:
Unable to launch an application and SecurityException after Java 7 Update 51
While I tried to open oracle form (The Oracle Forms Server is on a remote machine) I got an error message: SecurityException.
After a short research, I found that the JAR file manifest contains information about the contents of the JAR file, including security and configuration information and we have to add attributes to the manifest before the JAR file is signed. The Permissions attribute is used to verify that the permissions level requested by the RIA when it runs matches the permissions level that was set when the JAR file was created. We use this attribute to help prevent someone from re-deploying an application that is signed with your certificate and running it at a different privilege level. So we have to set this attribute to one of the following values:
- sandbox – runs in the security sandbox and does not require additional permissions.
- all-permissions – requires access to the user’s system resources.
The following changes to Security Slider were included in this release(7u51):
- Block Self-Signed and Unsigned applets on High Security Setting
- Require Permissions Attribute for High Security Setting
- Warn users of missing Permissions Attributes for Medium Security Setting
For more information, you can see Java Control Panel documentation.
This comment from stackoverflow get me to read more about blocked applications by security settings with the latest Java (Java 7 Update 51). So I finally reach the conclusion that Java has further enhanced security to make the user system less vulnerable to external exploits. Starting with Java 7 Update 51, Java does not allow users to run applications that are not signed (unsigned), self-signed (not signed by trusted authority) or that are missing permission attributes. Decision for me was to follow steps to Add URLs to the Exception Site list: