Java heap space error

[Rupesh Sadawarte]

Hi,

    I am upgrading Gerrit to version gerrit-3.6.8 but getting these error during reindexing. 

     My JAVA_HEAPLIMIT is set to 20g . Git repo have 500GB old data and its always failed after 50% changes. Do I need to assign more heap limit space? how can I troubleshoot the reindexing errors? 

    Thanks.

reindexing logs: 

Reindexing changes: changes: 45% (16403/36106), failed: 1066, project-slices: 70% (739/1045), Slicing projects: 100% (3857/3857)
(\)ERROR com.google.gerrit.index.SiteIndexer : Failed to index project gallo/platform/vendor/qcom/msm8909-la-1-1_amss_oem_milestone-major (0/1)
java.util.concurrent.ExecutionException: java.lang.OutOfMemoryError: Java heap space

[Nuno Costa]

Hi,

If you are doing offline reindex, you can run the command with -Xms=xx and -Xmx=xxx to increase the heap during reindex.

[Matthias Sohn]

On Fri, May 29, 2026 at 10:46 AM Rupesh Sadawarte <rupes...@gmail.com> wrote:

Hi,

    I am upgrading Gerrit to version gerrit-3.6.8 but getting these error during reindexing. 

3.6.8 is old and EOL. Hence you should consider upgrading to a supported release (at least 3.12).

There are many performance improvements also regarding reindexing in newer versions.

 

     My JAVA_HEAPLIMIT is set to 20g . Git repo have 500GB old data and its always failed after 50% changes. Do I need to assign more heap limit space? how can I troubleshoot the reindexing errors? 

Try to increase the max heap size, it's not unusual to use 100 GB heap size for running large gerrit instances.

 

    Thanks.

reindexing logs: 

Reindexing changes: changes: 45% (16403/36106), failed: 1066, project-slices: 70% (739/1045), Slicing projects: 100% (3857/3857)
(\)ERROR com.google.gerrit.index.SiteIndexer : Failed to index project gallo/platform/vendor/qcom/msm8909-la-1-1_amss_oem_milestone-major (0/1)
java.util.concurrent.ExecutionException: java.lang.OutOfMemoryError: Java heap space

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