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From "Erick Erickson (JIRA)" <>
Subject [jira] [Commented] (SOLR-12776) Setting of TMP in solr.cmd causes invisibility of Solr to JDK tools
Date Sun, 23 Sep 2018 17:19:00 GMT


Erick Erickson commented on SOLR-12776:

Very slightly modified, uses TMP_SOLR_HOME rather than TMP1. I'll probably check this in later

One thing I'm unsure about given my unfamiliarity with Windows scripting, This assignment
(This wasn't changed by the patch BTW, it just looks odd)


What's the meaning of the equals sign after the last percent sign? the {{%=!}} at the end?


For future reference, the convention is just to label the patch with the Jira number and
a ".patch" extension. If multiple copies are uploaded with the same name, they're all kept
and the newest one is in blue with the rest gray. No big deal, just FYI.

> Setting of TMP in solr.cmd causes invisibility of Solr to JDK tools
> -------------------------------------------------------------------
>                 Key: SOLR-12776
>                 URL:
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: scripts and tools
>    Affects Versions: 5.0
>         Environment: Windows. Tested with Java 8u152 and Solr 6.3.0.
>            Reporter: Petr Bodnar
>            Assignee: Erick Erickson
>            Priority: Major
>         Attachments: SOLR-12776.patch, simple-rename-fix.patch
> (issue firstly discussed in here:
> Please notice the following lines added (among others) to "solr.cmd" by commit []
for about 4 years ago (v5.0):
> {code:java}
> IF NOT "%TMP%"=="%SOLR_HOME%" (
>   set "SOLR_LOGS_DIR=%SOLR_HOME%\..\logs"
>   set "LOG4J_CONFIG=file:%EXAMPLE_DIR%\resources\"
> ){code}
> Apparently, the new variable "TMP" is just a temporary one, but by coincidence, this
variable is also important for JVM. As this system variable tells where the "hsperfdata_<username>"
directory for storing applications' monitoring data should be located. And if this is changed,
JDK tools like JVisualVM, jps and others won't locally see the given Java application, because
they search in a different default location.
> h3. Proposed solution
> A working solution seems to be just to *rename the TMP variable* to for example TMP1
as in the attached [^simple-rename-fix.patch]. Maybe even a simple "==" comparison of SOLR_HOME
and EXAMPLE_DIR could (should?) be made, but I don't have enough time to study and test this

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