Gerrit gc failing with java.lang.NullPointerException

[suman...@gmail.com]

Hi All,

we are facing some issue in gerrit , while performing the gerrit gc , getting below error 

ssh <host> gerrit gc --show-progress <project>   

collecting garbage for " some_project":

Pack refs:              100% (1556/1556)

Counting objects:       2654

Finding sources:        100% (2654/2654)

Getting sizes:          100% (611/611)

Compressing objects:    100% (358998/358998)failed

java.lang.NullPointerException

gerrit version: 3.2.7

java version: jdk8

can anyone suggest for same.

[Martin Fick]

On Sat, 1 Apr 2023 at 12:08, suman...@gmail.com <suman...@gmail.com> wrote:

we are facing some issue in gerrit , while performing the gerrit gc , getting below error 

java.lang.NullPointerException

Is there a stacktrace in the logs for that NPE?

-Martin

[doug.r...@wandisco.com]

You might want to run "git fsck --verbose" on that repository and see what it tells you...

[Doug Robinson]

Suman:

Please always include the mailing list in your replies.  Also, please do not "top-post".

On Fri, Apr 7, 2023 at 2:58 AM suman...@gmail.com <suman...@gmail.com> wrote:

Thanks , i have tried it , found that , some of the dangling commits .

example:

Checking d3ff942e3ccc4c73c03b7e21febb349e96a15fea
Checking fg77fefafdce27c190cac4842fb7640327c52e339
Checking gc3f971eab45bb5c26a85ae71f066577368c339e
dangling commit 39c02169556a4688e6e769bee04fa9023
dangling commit 6242f2cb882c293587fbf947640327c52
dangling commit f10429f8f70095402b5f3bf7256ad23c2

The "dangling commit" messages are normal and do not indicate corruption.

Based on this, either the repository was healed by some  "git fsck" operation or jgit's gc operation in the version you are using has a bug.  The complete stack traceback from the NPE would likely be appreciated.

That said, in general doing git repository GC via Gerrit is not scalable due to java heap management.  You would do much better to disable repository GC via Gerrit and use the C language Git binaries to do that job (or the jgit standalone tool).

Cheers.

Doug

--

DOUGLAS B ROBINSON SENIOR PRODUCT MANAGER

T +1 925 396 1125

E doug.r...@wandisco.com

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