Variables not showing while debugging in Eclipse

Question

I am running Eclipse Galileo for developers   When I run in debug mode  the current variables and their values are not coming up in the Variables window  The window remains empty when I step through my code after a breakpoint   Last night it was working  so I m perplexed  Any reason why this might be happening and any tip on troubleshooting

User · Answer

try a right click on the variable and select inspect  then it should come up in a popup window

User · Answer

My prbolem was that i used OpenMP  i disabled OpenMP then local variables appeared

User · Answer

Most often you would have imported multiple eclipse projects and you have switched between Git Branch  And then  you build and import incorrect project where debugger is not expected to come  If reset eclipse Perspective doesn t worked  Then do following things    Delete eclipse project from disk   Clean and Build the eclipse project  In my case I used ANT tool   Note  Verify whether your are building the project in which the debugger is expected to come  The correct project name to be built can be found by hovering over a file where debug point is set   Import that eclipse project again   Also  Verify whether correct JDK is being selected at Preferences - gt  Installed JREs

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I was running into this problem because eclipse thinks that the code that is executing is commented out   There is an  ifndef wrapper  and the condition evaluates to false in part of the project   Unfortunately  CDT wasn t quite smart enough  Helios or Keppler  to realize that it s not always false  and when stepping through that portion of the code  the variables window doesn t work   I can still inspect individual variable values

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For me the solution of the problem was to configure xdebug properly  I added in the php ini this lines of code    zend extension    C  xampp php ext php xdebug dll   xdebug remote enable   1   xdebug show local vars   1  The important part I was missing   xdebug remote enable   1

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Like with every bad software the treatment for this wrong behaivier does not exist  What is good for one does not work for others   I let the debuger to stop on a brakepoint once  then again second time and on the third time the beast has shown the Variable View with all data in it

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Also  your process needs to be suspended for Eclipse to show variables  If it is running  Eclipse won t show any variable   To suspend a thread  select a thread in the  debug  view  and hit  Suspend

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I restarted Eclipse and it worked again

User · Answer

Go to Eclipse Menu -- gt  Window    gt   Show View    gt  Variables This should bring back your variables window in eclipse

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I ended up trying something easy by resetting the Debug perspective  which seemed to work   Window    Perspective    Reset Perspective      Thanks for the comments

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My problem was that I couldn t see variables names  but just the value  After trying quite a while I got the solution  Click on the down arrow  in degub Variables tab  --  Layout --  show columns  It did the trick

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In my case I think the potential cause is Variables View did t initial properly    Alternative is enter another breakpoint before right code need to change variables After entering the second breakpoint above menthioned  added eclipse will refresh the view and all things should be normal again

User · Answer

If you are able to jump on breakpoints  it is ok to Reset Perspective   On Eclipse Version  Luna Service Release 2  4 4 2  Build id  20150219-0600 I notived that not only the Variable View was empty  but also the buttons to navigate the execution  F5  F6  F8 functionality buttons  were disabled  In this case  go to Debug View  right click to the row with the yellow pause symbol  and choose an option like  Resume   On the next breakpoint  Variable View will be automagically fullfilled and execution navigation buttons will be enabled  Can t explain why

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None of the solutions worked for me  What solved my problem was under the drop down arrow in the Variable window  On the Layout option  I had to choose  Variables View Only  and then I could see the variable s values again    This problem also suddenly appear out of nowhere  One moment Debug was working and the next it wasn t

User · Answer

Window --  Show View --  Variables

User · Answer

Windows --   showView --  variable   or you can reset the perspective     windows --   preferences --   perspective --  restore Defaults

User · Answer

I had the same issue and after I installed MinGW I could see the variables

User · Answer

If you are looking for a  live view of the object your are working with   when you hover over and all you see is the name make sure you place a break point on the method you are testing on  Otherwise when you hover over you will only get the method name   Anyways I hope this helps someone  I tried all the above steps which are great  but I still could not view the object I was working with live  It may just be rookie mistake   Best of luck

User · Answer

What worked for me is the following  I had a blank Variables view for the top stack frame  I selected a lower stack frame  then reselected the top one  and the Variables view refreshed itself somehow  Note  I m using Eclipse Mars  so this bug appears to have returned in this version  or perhaps it s a different one  with the same symptoms

User · Answer

Did not find a solution after trying the above answers -  Maybe this is very specific to my case -  Solution was to ensure that the option   Skip All Breakpoints  is not enabled in Eclipse Run -   Skip  All Breakpoints  ctl-alt-B   toggle

User · Answer

I found I needed to remove static declarations if I wanted to see the variables  but this works better     Modify view static variables while debugging in Eclipse

User · Answer

Assuming you have your debug view just how you like it and don t want to have to reset it everytime this bug appears  try this   This assumes your  Debug View  has both  Expressions  and  Variables  views open   Double-Click the Expressions tab  the actual tab with the text  not the  window bar     This will maximise it  Repeat to restore it to previous size location   That should reset everything except Expressions   Repeat for the variables tab and it will reset expressions   This worked for me on Windows 10 with Eclipse  Version  2018-09  4 9 0  Build id  20180917-1800 Java  jdk1 8 0 171

User · Answer

It s possible your Java compiler is configured not to preserve variable information  Right-click on the project in Project Explorer  then select Properties   Java Compiler   Add variable attributes to generated class files  used by the debugger   Without this option set  you will only see fields in the Variables view  not local variables

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I too have this problem  EclipseNeon   Tomcat8 doesn t show all the variables when in debug mode  I ve tried above suggestions without success  Then I have debugged the same web project with NetBeans8   GlassFish4 and all the variables are listed with values  Then I have debugged the same web project with NetBeans8   Tomcat8  and not all the variables are listed  Then I ve installed GlassFish4 for EclipseNeon and  debugging the same web project  all the variables are listed with values  So  the problem is in Tomcat8  A note  run Eclipse as administrator to install GlassFish4  with NetBeans is easier to install other servers

User · Answer

I used Fender s style above  but selected to  Watch  a variable   Once in the Expressions tab  I just moved over to the Variables tab and Voila - variables back in business

User · Answer

Resetting the perspective wasn t quite enough for me  I had to first delete the  Variables  tab and then reset the perspective  which reinstated the Variables tab in a working state    One other thing not mentioned above which might help others - when the variables tab is not working  the tab title is in italics  whatever that signifies    When it s working it goes back to normal font

User · Answer

In my case  the variable didn t show up because in the settings of the debuger  in my case xdebug  I changed Max children   max data   max array depth to big values     I reset the config and it worked

User · Answer

Resetting the view and re opening Eclipse did not help me  but this worked for me    click on the arrow down button in the Variables window -  Layout -  Select Columns -  Check whichever columns you want    Even though I already had both  name  and  value  checked  i unselected and selected them again  clicked  OK  and the column appeared

[eclipse] Variables not showing while debugging in Eclipse

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