Eclipse - debugger doesn t stop at breakpoint

Question

I am trying to trouble shoot a JUnit  In the source code  I have set break point in two places  1  in a line where a static member is initialized 2  the first line of one of the test cases   The debugger stops in the static field initializing line  But it doesn t stop in the test case  No matter where I set the break point in the test case  the debugger doesn t stop there  I know for sure that the test case is executed as I can see the log messages that I have added appear in the log   Any help would be greatly appreciated   I am using Eclipse Galileo and JUnit4 launcher

User · Answer

Make sure you declare the package at the top. In my groovy code this stops at breakpoints:

package Pkg1

import java.awt.event.ItemEvent;

isMule = false

class LineItem {
    // Structure defining individual DB rows
    public String ACCOUNT_CODE
    public String ACCOUNT_DESC
...

This does not stop at breakpoints:

import java.awt.event.ItemEvent;

isMule = false

class LineItem {
    // Structure defining individual DB rows
    public String ACCOUNT_CODE
    public String ACCOUNT_DESC
...

User · Answer

Remove all breakpoints and re-add them

User · Answer

In order to debugger work with remote  the java  class files must be complied along with debugging information  If  -g none  option was passed to compiler then the class file will not have necessary information and hence debugger will not be able to match breakpoints on source code with that class in remote  Meanwhile  if jars class files were obfuscated  then they also will not have any debug info  According to your responses  most probably this is not your case  but this info could be useful for others who face the same issue

User · Answer

Usually when this happens to me  rare but it does  means that the code being executed is different than the code in the editor    It will happen from time to time for Eclipse that the built classes and the code in editor are out of sync   When that happens I get all sort of weird debugger behavior  debugging empty lines  skipping lines of codes etc    Restarting Eclipse  clean all projects and rebuild everything usually clears things up    I had also the Maven plugins  older versions    had not had it for a while now  that had a tendency to do that too   Otherwise it might be a bug  maybe the one Vineet stated   Hope this helps

User · Answer

You might have accidentally skipped all break points in Eclipse toolbar  To fix this go to Eclipse -  Run -  Skip All Breakpoints

User · Answer

This is what works for me   I had to put my local server address in the PHP Server configuration like this     Note  that address  is the one I configure in my Apache  conf file   Note  the only breakpoint that was working was the  Break at first line   after that  the breakpoints didn t work   Note  check your xdebug properties in your php ini file  and remove any you think is not required

User · Answer

Project -  Clean seemed to work for me on on JRE 8

User · Answer

Make sure  under Run   Debug Configurations  that  Stop in main  is selected  if applicable to your situation

User · Answer

If you are on Eclipse   Right click on your project folder under  Package Explorer    Goto Source -  Clean up and choose your project   This will cleanup any mess and your break-point should work now

User · Answer

If nothing works-    Remove that Remote Local Debug Configuration  and Create a new One  Add the Source in Debug Configurations

User · Answer

In my case the problem was that I hadn t Debug view open in Debug perspective  so   1 - Be sure you have debug perspective opened     2 - Be sure you have debug view opened

User · Answer

In my case I had multiple projects in same workspace  The java file I was trying to debug was present in more than one projects with same package   I didn t need the other project  so simply closed unrelated projects  or remove the file from unrelated project

User · Answer

Go to Right click- gt Debug Configuration and check if too many debug instances are created  My issue was resolved when i deleted multiple debug instances from configuration and freshly started debugging

User · Answer

Creating a new workspace worked for me

User · Answer

This could be related to one of the bugs in JDK 6 Update 14  as indicated in the release notes for JDK 6 update 15   If this indeed turns out to be the issue  you should move to a higher version of the JDK  that s no guarantee though  since fixes have been released against 6u16  6u18 and 7b1   The best bet is to use -XX  UseParallelGC flag  Increasing the size of the minimum and maximum heap size  to delay the first GC  bring temporary relief   By the way  use this bug report in Eclipse to track how others have been faring

User · Answer

One additional comment regarding Vineet Reynolds answer   I found out that I had to set -XX  UseParallelGC in eclipse ini  I setup the virtual machine  vm  arguments as follows  -vmargs -Dosgi requiredJavaVersion 1 7 -Xms512m -Xmx1024m -XX  UseParallelGC -XX PermSize 256M -XX MaxPermSize 512M   that solved the issue

User · Answer

For JDK7  run- Debug Configurations  check  Keep JUnit running after a test run when debugging

User · Answer

Happened to me once  when I had unchecked  Run   Build automatically  and forgot to re-check it

User · Answer

To remove the breakpoints    Debug your class as a junit test When your debugger stops  click the  breakpoints  tab next to  variables  and  expressions  At the top right of the breakpoint tab  click the button with two  X  Stop the test  replace your breakpoint and run the debugger again

User · Answer

Also verify if breakpoints on other lines DO work  it may be a bug in the debugger  I have had a problem with the Eclipse debugger where putting a breakpoint on a boolean assignment whose code was on the next line didn t work I reported this here  but putting it on the previous or next line did

User · Answer

Another possible problem is that the debugger port may be blocked by the firewall  For example  I was using mule anypoint studio  v 5 4 3   The default debugger port is 6666  When a flow is executed  it would not stop at breakpoint  when I changed the port to another  e g  8099   it worked fine

User · Answer

Fix could be as simple as clicking run skip all breakpoints  Worked for me

[java] Eclipse - debugger doesn't stop at breakpoint

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