I currently have an Apache Tomcat (9.0.43) server running on jre1.8.0_261. For various reasons, I'm trying to run the same code on jre-9.0.4. When I try this, I get the following error in Apache's localhost.date.log file:
java.lang.NoClassDefFoundError: Could not initialize class customName.customConfig.User
where customName and customConfig are parts of a user-defined class (which we wrote) that has been successfully running on Tomcat for years, and continues to work just fine on jre1.8. It's only when I try to run with jre-9.0.4 that I get the error.
Is there a way to get jre-9 to 'recognize' the class, for lack of a better word? I know where to find its .class file (and so does jre-1.8).
Related
I have a spring boot application bundled as war file , and able to push to App Engine
But I am getting problems starting app (I suspect there could be an issue with DB too...but couldnt remember where I saw...a nightmare)
java.lang.RuntimeException: java.lang.IllegalStateException: Logback
configuration error detected: ERROR in
ch.qos.logback.core.rolling.RollingFileAppender[FILE] - Failed to
create parent directories for
[/base/data/home/apps/e~pemy/20210716t001812.436581063072799646/logs/pynew.log]
ERROR in ch.qos.logback.core.rolling.RollingFileAppender[FILE] -
openFile(logs/pynew.log,true) call failed.
java.io.FileNotFoundException: logs/pynew.log (No such file or
directory)
I am using the below properties in my application props
> logging.file.path=logs
> logging.file.name=${logging.file.path}/pynew.log
I am finding it very hard to include google specific dependencies and properties , and making a mess of my project...created app.yaml, web-inf>> appengine-web xml, logging.properties (not sure why but added as told in a tutorial)
Question: How can I create parent directory or link to cloud storage folder etc?
I also want to specify a profile and I see I can do it in yaml file. Is this used only
env_variables:
JAVA_USER_OPTS: '-Dspring.profiles.active=prod'
But I would like to know how to connect to Cloud SQL
spring.datasource.url=jdbc:mysql:///mydb?cloudSqlInstance=myapp:europe-west2:dBinstancename&socketFactory=com.google.cloud.sql.mysql.SocketFactory
spring.datasource.username=${dbuser}
spring.datasource.password=ENC(${dbencpwd})
spring.cloud.gcp.sql.database-name=mydb
spring.cloud.gcp.sql.instance-connection-name=myapp:europe-west2:dBinstancename
It is so confusing that I keep forgetting which connection needs password and which wont. and keep breaking my local
Question
Assuming that I need to supply credentials, How can I supply - ${dbuser}
I used the default spring logger with logback-spring.xml for all my development, and this is not working on AppEngine
So I followed https://cloud.google.com/logging/docs/setup/java
and added logback.xml and the dependency
implementation 'com.google.cloud:google-cloud-logging-logback:0.121.3-alpha'
I want to validate xml against schema - using SpringBoot 2 and camel 3.
On localhost this works:
.to("validator:file:src/main/resources/D.xsd")
But when uploaded to server on tomcat machine with context for example D - i get an error:
Caused by: java.io.FileNotFoundException: src/main/resources/D.xsd (No such file or directory)
I think that i need to change the path to use classpath - but i am not sure how to make it work ?
What i tried:
.to("validator:file:classpath:/src/main/resources/D.xsd")
.to("validator:file:resource:classpath:src/main/resources/D.xsd")
.to("validator:file:resource:classpath:/src/main/resources/D.xsd")
But it does not work.
In one of my applications (but with SpringBoot 1.5 and Camel 2.x) this works fine
.to("validator:classpath:folder/filename.xsd")
to validate against filename.xsd that is located in src/main/resources/folder
I've managed to fix it with:
.to("validator:D.xsd")
I am new to Java Modularity. I am using Java 9.
The program compiles without complaint. It also runs perfectly well from the "exploded module" folder, but with one exception: it throws an exception whose cause originates with the following line of code:
URL introURL = AboutPanel.class.getResource("help.html");
introURL is being assigned null.
When running the program in Eclipse, or from a jar file exported from Eclipse, the URL is populated correctly with the address of a resource file (help.html) that is in the same directory as the calling class.
Here is the command I use to run the program from the "exploded module" that is in the "out" folder:
java -p out/ -m moduleTCD/com.adonax.tanpura.TCDLaunch
The project consists of two packages that I am bundling together in a single module.
src/moduleTCD/com/adonax/tanpura
/pfaudio
The "main" class (entry point) is tanpura.TCDLaunch.
Here is the module-info.java class contents:
module moduleTCD {
exports com.adonax.tanpura;
requires java.base;
requires java.desktop;
}
The error statement, when trying to run from the command line:
java.io.IOException: invalid url
at java.desktop/javax.swing.JEditorPane.setPage(Unknown Source)
at moduleTCD/com.adonax.tanpura.documentation.AboutPanel.<init>(AboutPanel.java:28)
at moduleTCD/com.adonax.tanpura.panels.ControlPanel.initializeHelpPanel(ControlPanel.java:525)
at moduleTCD/com.adonax.tanpura.panels.ControlPanel.<init>(ControlPanel.java:163)
at moduleTCD/com.adonax.tanpura.TCDLaunch.main(TCDLaunch.java:43)
This exception is thrown in a try/catch for IOException at the point where the JEditorPane method setPage is called with null as an argument.
textArea.setPage(introURL);
At first, I didn't have an exports line in my module-info.java, but added it when I read the following from the API for Class.getResource:
Returns:
A URL object; null if no resource with this name is found, the resource cannot be located by a URL, the resource is in a package that
is not open to at least the caller module, or access to the resource
is denied by the security manager.
This raised the possibility that the package might be needed by Class in the module Java.base. The exports command there now is the broadest possible. But adding it did not change the error. I'm wondering if there is something wrong with how I did this, or if there is something else I am overlooking.
Classic error on my part. I made assumptions about the error being related to tech that is new and unfamiliar to me, rather than first verifying the obvious.
The fail was due to not realizing that the javac command did not move required resources into the target folder system.
I also verified that an "exports" statement is NOT needed in module-info in order to allow the loading of the resource.
So, in fact, this was not a java-module issue at all, just an oversight which I credit in part to a lack of chops using shell-level Java commands.
Big thank you to Alan Bateman!
I am using the MeanJS (https://github.com/meanjs/mean) framework, running on Heroku. When I try to run the application I get errors like:
Error: Cannot find module 'eslint-config-airbnb/legacy'
I am running in production mode (NODE_ENV=production).
The question I have is, it seems like gulpfile.js (when running the task prod) calls the task lint which calls the task eslint. But when I look at the packages.json file, I see that eslint-config-airbnb is only included in the devDependancies (and not dependancies). Now I tired to add it to dependancies, but I still get the same error about the missing module.
I'm new to MEAN.js, so I appreciate any help.
I would like to be able to package my jpa-ejb-web project as a standalone application, by using Glassfish embedded API.
To use the JPA layer, I need to deploy the sun-resource.xml configuration, which should be possible with the asadmin command add-resources path\to\sun-resources.xml. I've this code to do it:
String command = "add-resources";
ParameterMap params = new ParameterMap();
params.add("", "...\sun-resources.xml" );
CommandRunner runner = server.getHabitat().getComponent(CommandRunner.class);
ActionReport report = server.getHabitat().getComponent(ActionReport.class);
runner.getCommandInvocation(command, report).parameters(params).execute();
but Glassfish refuses it with:
15-Jul-2010 16:34:12 org.glassfish.admin.cli.resources.AddResources execute
SEVERE: Something went wrong in add-resources
java.lang.Exception: ...\gfembed6930201441546233570tmp\lib\dtds\sun-resources_1_4.dtd (The system cannot find the path specified)
at org.glassfish.admin.cli.resources.ResourcesXMLParser.initProperties(ResourcesXMLParser.java:163)
at org.glassfish.admin.cli.resources.ResourcesXMLParser.<init>(ResourcesXMLParser.java:109)
at org.glassfish.admin.cli.resources.ResourcesManager.createResources(ResourcesManager.java:67)
at org.glassfish.admin.cli.resources.AddResources.execute(AddResources.java:106)
at com.sun.enterprise.v3.admin.CommandRunnerImpl$1.execute(CommandRunnerImpl.java:305)
at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:320)
at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:1176)
at com.sun.enterprise.v3.admin.CommandRunnerImpl.access$900(CommandRunnerImpl.java:83)
at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1235)
at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1224)
at javaapplication4.Main.main(Main.java:55)
and indeed, there is no lib directory on the indicated path ...
is there something wrong in my code? (I use glassfish-embedded-all-3.0.1.jar)
Thanks
I solved it by specifying an Embedded File System for the embedded Glassfish, and prepopulated the /path/to/my/glassfish/lib/dtds folder with the files which were missing.
EmbeddedFileSystem.Builder efsb = new EmbeddedFileSystem.Builder();
efsb.autoDelete(false);
efsb.installRoot(new File("/path/to/my/glassfish"), true);
EmbeddedFileSystem efs = efsb.build();
Server.Builder builder = new Server.Builder("test");
builder.embeddedFileSystem(efs);
builder.logger(true);
Server server = builder.build();
server.addContainer(ContainerBuilder.Type.all);
server.start();
and asking Glassfish not to delete the folder at the end of the execution.
I'm not sure this is possible, Running asadmin Commands Using the Sun GlassFish Embedded Server API doesn't mention such a use case (passing a sun-resources.xml).
But I would use a preconfigured domain.xml instead of trying to deploy a sun-resource.xml file, the result should be similar. From the Sun GlassFish Enterprise Server v3 Embedded Server Guide:
Using an Existing domain.xml File
Using an existing domain.xml file
avoids the need to configure embedded
Enterprise Server programmatically in
your application. Your application
obtains domain configuration data from
an existing domain.xml file. You can
create this file by using the
administrative interfaces of an
installation of nonembedded Enterprise
Server. To specify an existing
domain.xml file, invoke the
installRoot, instanceRoot, or
configurationFile method of the
EmbeddedFileSystem.Builder class or
a combination of these methods.
The documentation provides code samples showing how to do this (should be pretty straightforward).