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https://issues.apache.org/jira/browse/NETBEANS-45?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16101012#comment-16101012
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Wade Chandler commented on NETBEANS-45:
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[~jlahoda] It happens quite often that my Mac (i7 quad core ... 8 hyper), 16 GB
RAM, and SSD will spin up fans like crazy (checking CPU shows NB using up many
cores). Too, code completion and other items are blocked in the IDE. Down in my
status bar there will be "Checking for external changes". I do switch between
the CLI (using git) and the IDE a good bit. I have waited hours on purpose to
try to see if it would free up, and it will not, so I have taken these thread
dumps during those periods. Often it will say "suspended" on the external
changes scanning, and there will be some other task running, but then the
external changes sticks around (as long as I ever care to wait). This used to
happen on Linux and Windows both, but I haven't used either as my laptop in a
couple years.
> Code completion is blocked for an extended period of time
> ---------------------------------------------------------
>
> Key: NETBEANS-45
> URL: https://issues.apache.org/jira/browse/NETBEANS-45
> Project: NetBeans
> Issue Type: Bug
> Components: editor - Parsing & Indexing
> Affects Versions: 9.0
> Reporter: Attila Kelemen
> Attachments: callstack.csv,
> nb-jstack-cpu-high-checking-for-external-changes-with-gradle-and-maven-2017-04-19-10.log.tdump,
>
> nb-jstack-cpu-high-checking-for-external-changes-with-gradle-and-maven-2017-04-19-11.log.tdump,
>
> nb-jstack-cpu-high-checking-for-external-changes-with-gradle-and-maven-2017-04-19-12.log.tdump,
>
> nb-jstack-cpu-high-checking-for-external-changes-with-gradle-and-maven-2017-04-19-1.log.tdump,
>
> nb-jstack-cpu-high-checking-for-external-changes-with-gradle-and-maven-2017-04-19-2.log.tdump,
>
> nb-jstack-cpu-high-checking-for-external-changes-with-gradle-and-maven-2017-04-19-3.log.tdump,
>
> nb-jstack-cpu-high-checking-for-external-changes-with-gradle-and-maven-2017-04-19-4.log.tdump,
>
> nb-jstack-cpu-high-checking-for-external-changes-with-gradle-and-maven-2017-04-19-5.log.tdump,
>
> nb-jstack-cpu-high-checking-for-external-changes-with-gradle-and-maven-2017-04-19-6.log.tdump,
>
> nb-jstack-cpu-high-checking-for-external-changes-with-gradle-and-maven-2017-04-19-7.log.tdump,
>
> nb-jstack-cpu-high-checking-for-external-changes-with-gradle-and-maven-2017-04-19-8.log.tdump,
>
> nb-jstack-cpu-high-checking-for-external-changes-with-gradle-and-maven-2017-04-19-9.log.tdump,
>
> nb-jstack-cpu-high-checking-for-external-changes-with-gradle-and-maven-2017-05-30-10.log,
>
> nb-jstack-cpu-high-checking-for-external-changes-with-gradle-and-maven-2017-05-30-11.log,
>
> nb-jstack-cpu-high-checking-for-external-changes-with-gradle-and-maven-2017-05-30-12.log,
>
> nb-jstack-cpu-high-checking-for-external-changes-with-gradle-and-maven-2017-05-30-1.log,
>
> nb-jstack-cpu-high-checking-for-external-changes-with-gradle-and-maven-2017-05-30-2.log,
>
> nb-jstack-cpu-high-checking-for-external-changes-with-gradle-and-maven-2017-05-30-3.log,
>
> nb-jstack-cpu-high-checking-for-external-changes-with-gradle-and-maven-2017-05-30-4.log,
>
> nb-jstack-cpu-high-checking-for-external-changes-with-gradle-and-maven-2017-05-30-5.log,
>
> nb-jstack-cpu-high-checking-for-external-changes-with-gradle-and-maven-2017-05-30-6.log,
>
> nb-jstack-cpu-high-checking-for-external-changes-with-gradle-and-maven-2017-05-30-7.log,
>
> nb-jstack-cpu-high-checking-for-external-changes-with-gradle-and-maven-2017-05-30-8.log,
>
> nb-jstack-cpu-high-checking-for-external-changes-with-gradle-and-maven-2017-05-30-9.log,
>
> nb-jstack-cpu-high-opening-gradle-and-maven-projects-2017-01-18-10.log.tdump,
> nb-jstack-cpu-high-opening-gradle-and-maven-projects-2017-01-18-11.log.tdump,
> nb-jstack-cpu-high-opening-gradle-and-maven-projects-2017-01-18-12.log.tdump,
> nb-jstack-cpu-high-opening-gradle-and-maven-projects-2017-01-18-1.log.tdump,
> nb-jstack-cpu-high-opening-gradle-and-maven-projects-2017-01-18-2.log.tdump,
> nb-jstack-cpu-high-opening-gradle-and-maven-projects-2017-01-18-3.log.tdump,
> nb-jstack-cpu-high-opening-gradle-and-maven-projects-2017-01-18-4.log.tdump,
> nb-jstack-cpu-high-opening-gradle-and-maven-projects-2017-01-18-5.log.tdump,
> nb-jstack-cpu-high-opening-gradle-and-maven-projects-2017-01-18-6.log.tdump,
> nb-jstack-cpu-high-opening-gradle-and-maven-projects-2017-01-18-7.log.tdump,
> nb-jstack-cpu-high-opening-gradle-and-maven-projects-2017-01-18-8.log.tdump,
> nb-jstack-cpu-high-opening-gradle-and-maven-projects-2017-01-18-9.log.tdump
>
>
> Often times when editting a single file, code completion blocks for an
> extensive amount of time which makes code completion practically unusable.
> Looking at the threads of the IDE, code completion and parsing seems to be
> blocked by the attached thread (holding a lock).
> Note that I do not do anything but edit a single file and this happens
> frequently during editting even though there are no external changes.
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