No embedded stylesheet instruction for file: error using logback

Question

I have the following logback.xml configuration:

<configuration>
  <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
    <!-- encoders are assigned the type
         ch.qos.logback.classic.encoder.PatternLayoutEncoder by default -->
    <encoder>
      <pattern>%-4relative [%thread] %-5level %logger{35} - %msg %n</pattern>
    </encoder>
  </appender>

    <appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
    <file>logFile.log</file>
    <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
      <!-- daily rollover -->
      <fileNamePattern>logFile.%d{yyyy-MM-dd}.log</fileNamePattern>

      <!-- keep 30 days' worth of history -->
      <maxHistory>30</maxHistory>
    </rollingPolicy>

    <encoder>
      <pattern>%-4relative [%thread] %highlight(%-5level) %cyan(%logger{35}) - %msg%n</pattern>
    </encoder>
  </appender> 

  <root level="DEBUG">
    <appender-ref ref="STDOUT" />
    <appender-ref ref="FILE" /> 

  </root>
</configuration>

If I edit the config file in eclipse (Juno), I get the following error:

11:02:54,114 INFO  [main] Main  - javax.xml.transform.TransformerFactory=null
11:02:54,115 INFO  [main] Main  - java.endorsed.dirs=C:\Program Files\Java\jre7\lib\endorsed
11:02:54,117 INFO  [main] Main  - launchFile: C:\Users\roberth\Programming_Projects\eclipse\.metadata\.plugins\org.eclipse.wst.xsl.jaxp.launching\launch\launch.xml
11:02:54,145 FATAL [main] Main  - No embedded stylesheet instruction for file: file:/C:/Users/roberth/Programming_Projects/eclipse/javaport/src/logback.xml
org.eclipse.wst.xsl.jaxp.debug.invoker.TransformationException: No embedded stylesheet instruction for file: file:/C:/Users/roberth/Programming_Projects/eclipse/javaport/src/logback.xml
    at org.eclipse.wst.xsl.jaxp.debug.invoker.internal.JAXPSAXProcessorInvoker.transform(JAXPSAXProcessorInvoker.java:225)
    at org.eclipse.wst.xsl.jaxp.debug.invoker.internal.JAXPSAXProcessorInvoker.transform(JAXPSAXProcessorInvoker.java:186)
    at org.eclipse.wst.xsl.jaxp.debug.invoker.internal.Main.main(Main.java:73)
Caused by: org.eclipse.wst.xsl.jaxp.debug.invoker.TransformationException: No embedded stylesheet instruction for file: file:/C:/Users/roberth/Programming_Projects/eclipse/javaport/src/logback.xml
    at org.eclipse.wst.xsl.jaxp.debug.invoker.internal.JAXPSAXProcessorInvoker.transform(JAXPSAXProcessorInvoker.java:214)
    ... 2 more

If I delete and recreate the config, sometimes it works, sometimes not. If I edit the file in Notepad++ or another text editor, it works fine. Is this an eclipse issue or am I missing something?

Answer 1

It's an Eclipse bug, I've noticed it too. Make sure that you're running the right Eclipse Runtime config (i.e. if you're clicking on the little green "Play" button on the top, thinking it will re-run the last (valid) Runtime you've ran, re-check (by clicking on the down arrow next to it) to make sure no new Runtime has been created).

What I've noticed it that even though I create a perfectly valid run-time pointing to a Java main class and everything, which I run a few times and all is good, after a while, if I select an xml file (because I wanted to edit it for example) and then leave it selected as I click on my run button, Eclipse will create a new XSLT Transformation run time for that xml file and try to run it, failing with the exception you report. The solution is to erase that run time, make sure I have no xml file selected, and re-run the correct run time.