So eclipse and xdebug walk into a bar, and then my apache server dies

Question

I am using windows xp x86, wamp, apache2, php 5.3 x86, eclipse php, and xdebug, running on localhost as both a virtualhost and an https virtualhost

eclipse version info
Eclipse for PHP Developers Version: Helios Release Build id: 20100617-1415

I had successfully managed, somehow, to setup eclipse and xdebug and all was well.

Then I had to make an svn branch of my project, and reconfigure apache with 2 new virtual hosts, and update my windows host files.

Now when I launch debug mode in eclipse everything dies.

Specifically, If I set no breakpoints the app runs fine, save for the problem I'm trying to debug in the first place.

If I set a breakpoint, the app stops at the breakpoint, and eclipse appears to be holding the ball. But now, when I press continue, or step over, or step into, or sneeze, eclipse tells me execution has resumed, but the application continues to hang, and I have to restart apache.

I suspect that there is some break in the communication between eclipse and xdebug, because it looks to me like eclipse is sending my continue or step over command, but xdebug is not receiving it.

But even if that's the case I don't know what to do about it. Where should I be looking?

Update:
I have successfully been able to debug using notepad++, its xdebug plugin, and, like a caveman, typing &XDEBUG_SESSION_START=session_name into the url. However, despite my love for npp, its debug plugin is quite buggy...

So I noticed an ad on stackoverflow for something called "phpstorm", which professed to be a lightweight yet full featured php ide, with native xdebug support. The demo required a restart to get it to work, and it feels kind of like working on a wobbly draft table, but it managed to debug both my small test app and real app very nicely, which is more than I can say for eclipse at the moment, even though its probably my fault.

I probably should have posted this earlier :/ Here is my phpinfo() xdebug section

xdebug xdebug support  enabled Version     2.1.0  Supported protocols Revision DBGp - Common DeBuGger Protocol     $Revision: 1.145 $  Directive   Local Value Master Value xdebug.auto_trace   Off Off xdebug.collect_assignments  Off Off xdebug.collect_includes On  On xdebug.collect_params   0   0 xdebug.collect_return   Off Off xdebug.collect_vars Off Off xdebug.default_enable   On  On xdebug.dump.COOKIE  no value    no value xdebug.dump.ENV no value    no value xdebug.dump.FILES   no value    no value xdebug.dump.GET no value    no value xdebug.dump.POST    no value    no value xdebug.dump.REQUEST no value    no value xdebug.dump.SERVER  no value    no value xdebug.dump.SESSION no value    no value xdebug.dump_globals On  On xdebug.dump_once    On  On xdebug.dump_undefined   Off Off xdebug.extended_info    On  On xdebug.file_link_format no value    no value xdebug.idekey   no value    no value xdebug.manual_url   http://www.php.net  http://www.php.net xdebug.max_nesting_level    100 100 xdebug.overload_var_dump    On  On xdebug.profiler_aggregate   Off Off xdebug.profiler_append  Off Off xdebug.profiler_enable  Off Off xdebug.profiler_enable_trigger  Off Off xdebug.profiler_output_dir  C:\xampp\tmp    C:\xampp\tmp xdebug.profiler_output_name xdebug_profile.%p   xdebug_profile.%p xdebug.remote_autostart Off Off xdebug.remote_connect_back  Off Off xdebug.remote_cookie_expire_time    3600    3600 xdebug.remote_enable    On  On xdebug.remote_handler   dbgp    dbgp xdebug.remote_host  localhost   localhost xdebug.remote_log   c:\xampp\apache\logs\xdebug.log c:\xampp\apache\logs\xdebug.log xdebug.remote_mode  req req xdebug.remote_port  9000    9000 xdebug.scream   Off Off xdebug.show_exception_trace Off Off xdebug.show_local_vars  Off Off xdebug.show_mem_delta   Off Off xdebug.trace_format 0   0 xdebug.trace_options    0   0 xdebug.trace_output_dir C:\xampp\tmp    C:\xampp\tmp xdebug.trace_output_name    trace.%c    trace.%c xdebug.var_displ   ay_max_children    128 128  xdebug.var_display_max_data    512 512  xdebug.var_display_max_depth   3   3 

Here is an xdebug log file of when I reproduce the problem

Log opened at 2011-01-03 08:56:22 -> <init xmlns="urn:debugger_protocol_v1" xmlns:xdebug="http://xdebug.org/dbgp/xdebug" fileuri="file:///C:/xampp/htdocs/lab/zf-tutorial/public/index.php" language="PHP" protocol_version="1.0" appid="4404" idekey="ECLIPSE_DBGP"><engine version="2.1.0"><![CDATA[Xdebug]]></engine><author><![CDATA[Derick Rethans]]></author><url><![CDATA[http://xdebug.org]]></url><copyright><![CDATA[Copyright (c) 2002-2010 by Derick Rethans]]></copyright></init>  <- feature_set -i 33 -n show_hidden -v 1 -> <response xmlns="urn:debugger_protocol_v1" xmlns:xdebug="http://xdebug.org/dbgp/xdebug" command="feature_set" transaction_id="33" feature="show_hidden" success="1"></response>  <- feature_set -i 34 -n max_depth -v 3 -> <response xmlns="urn:debugger_protocol_v1" xmlns:xdebug="http://xdebug.org/dbgp/xdebug" command="feature_set" transaction_id="34" feature="max_depth" success="1"></response>  <- feature_set -i 35 -n max_children -v 31 -> <response xmlns="urn:debugger_protocol_v1" xmlns:xdebug="http://xdebug.org/dbgp/xdebug" command="feature_set" transaction_id="35" feature="max_children" success="1"></response>  <- feature_get -i 36 -n encoding -> <response xmlns="urn:debugger_protocol_v1" xmlns:xdebug="http://xdebug.org/dbgp/xdebug" command="feature_get" transaction_id="36" feature_name="encoding" supported="1"><![CDATA[iso-8859-1]]></response>  <- feature_get -i 37 -n supports_async -> <response xmlns="urn:debugger_protocol_v1" xmlns:xdebug="http://xdebug.org/dbgp/xdebug" command="feature_get" transaction_id="37" feature_name="supports_async" supported="1"><![CDATA[0]]></response>  <- stdout -i 38 -c 1 -> <response xmlns="urn:debugger_protocol_v1" xmlns:xdebug="http://xdebug.org/dbgp/xdebug" command="stdout" transaction_id="38" success="1"></response>  <- stderr -i 39 -c 1 -> <response xmlns="urn:debugger_protocol_v1" xmlns:xdebug="http://xdebug.org/dbgp/xdebug" command="stderr" transaction_id="39" success="0"></response>  <- breakpoint_set -i 40 -t line -f file:///C:%5Cxampp%5Chtdocs%5Clab%5Czf-tutorial%5Cpublic%5Cindex.php -n 21 -> <response xmlns="urn:debugger_protocol_v1" xmlns:xdebug="http://xdebug.org/dbgp/xdebug" command="breakpoint_set" transaction_id="40" id="44040001"></response>  <- run -i 41 -> <response xmlns="urn:debugger_protocol_v1" xmlns:xdebug="http://xdebug.org/dbgp/xdebug" command="run" transaction_id="41" status="break" reason="ok"><xdebug:message filename="file:///C:/xampp/htdocs/lab/zf-tutorial/public/index.php" lineno="21"></xdebug:message></response>  <- stack_get -i 42 -> <response xmlns="urn:debugger_protocol_v1" xmlns:xdebug="http://xdebug.org/dbgp/xdebug" command="stack_get" transaction_id="42"><stack where="{main}" level="0" type="file" filename="file:///C:/xampp/htdocs/lab/zf-tutorial/public/index.php" lineno="21"></stack></response>  <- stack_get -i 43 -> <response xmlns="urn:debugger_protocol_v1" xmlns:xdebug="http://xdebug.org/dbgp/xdebug" command="stack_get" transaction_id="43"><stack where="{main}" level="0" type="file" filename="file:///C:/xampp/htdocs/lab/zf-tutorial/public/index.php" lineno="21"></stack></response>  <- eval -i 44 -- JHRoaXMtPmZpZWxkc1snYm9vbF9jb21wbGV0ZSdd -> <response xmlns="urn:debugger_protocol_v1" xmlns:xdebug="http://xdebug.org/dbgp/xdebug" command="eval" transaction_id="44"><property address="92404284" type="bool"><![CDATA[-1]]></property></response>  <- eval -i 45 -- JHRoaXMtPnN0YWdlLT5nZXQoJ2Jvb2xfY29tcGxldGUnKQ== -> <response xmlns="urn:debugger_protocol_v1" xmlns:xdebug="http://xdebug.org/dbgp/xdebug" command="eval" transaction_id="45"><property address="92404284" type="bool"><![CDATA[-1]]></property></response>  <- eval -i 46 -- JHRoaXMtPmZpZWxkc1snYm9vbF9jb21wbGV0ZSdd -> <response xmlns="urn:debugger_protocol_v1" xmlns:xdebug="http://xdebug.org/dbgp/xdebug" command="eval" transaction_id="46"><property address="92404284" type="bool"><![CDATA[-1]]></property></response>  <- eval -i 47 -- JHRoaXMtPnN0YWdlLT5nZXQoJ2Jvb2xfY29tcGxldGUnKQ== -> <response xmlns="urn:debugger_protocol_v1" xmlns:xdebug="http://xdebug.org/dbgp/xdebug" command="eval" transaction_id="47"><property address="92404284" type="bool"><![CDATA[-1]]></property></response>  === breakpoint reached, execution pauses.  In eclipse I click "step over"  <- step_over -i 48  === end of log 

Answer 1

This article sounds promising.

Both XDebug and Eclipse (in its php dev env) can use the DBGp protocol by the look of things. Based on that article, you might be able to get things working by messing with Apache's .htaccess file[s], or by running a DBGp proxy (whatever that is). Further details in the article.

I suspect both XDebug and Eclipse are connecting to the same PHP debug session, stepping on one anothers toes, causing Hilarity to Ensue.

That or "undefined behavior". Either way.

Answer 2

wooooooooooooo

https://bugs.eclipse.org/bugs/show_bug.cgi?id=312951#c8

Creating a new workspace allows me to debug succesfully.

Right now my best guess as to what caused this is having two projects in the same workspace with different vhosts at the same ip.

So I aint not gonna do that no more.