Avoid creating HTTP Sessions for Git-over-HTTP

The Change-Id: Iffcd0fbd7 has involuntarily triggered the
creation of a new HTTP Session for every invocation a Git-over-HTTP

All came from the mistake of tracing the HTTP session instead
of the Gerrit session in the audit record.
The HTTP Servlet API specs say that any attempt to access
the current session of an incoming request would result
in the creation of a brand-new session.

The session involuntarily created also had an expiry time
equal to zero, which prevented the session housekeeper
to reclaim them later on, even though they were unused.

The consequence of creating an empty session for every
Git-over-HTTP request isn't immediately tangible, because
the session is empty and doesn't occupy a significant
amount of memory. However, longer-term, the in-memory
hashtable that records all the sessions, each one using
750 bytes on average, will be causing the overload
of the JVM heap and the crash of the process because of
lack of available memory.

Use the correct Gerrit session-id, retrieving
from the Provider<WebSession> the proper session, if active
and logged in, and make sure in tests that no HTTP sessions
are created as a result of a Git-over-http request.

Bug: Issue 13858
Change-Id: I8c086fed54b196c3f46fa88ac78c127784524d30
5 files changed
tree: f3e655ca41ee8c32a7315611556930c33f72e2e5
  1. .settings/
  2. contrib/
  3. Documentation/
  4. gerrit-acceptance-framework/
  5. gerrit-acceptance-tests/
  6. gerrit-cache-h2/
  7. gerrit-cache-mem/
  8. gerrit-common/
  9. gerrit-elasticsearch/
  10. gerrit-extension-api/
  11. gerrit-gpg/
  12. gerrit-gwtdebug/
  13. gerrit-gwtexpui/
  14. gerrit-gwtui/
  15. gerrit-gwtui-common/
  16. gerrit-httpd/
  17. gerrit-index/
  18. gerrit-launcher/
  19. gerrit-lucene/
  20. gerrit-main/
  21. gerrit-oauth/
  22. gerrit-openid/
  23. gerrit-patch-commonsnet/
  24. gerrit-patch-jgit/
  25. gerrit-pgm/
  26. gerrit-plugin-api/
  27. gerrit-plugin-gwtui/
  28. gerrit-prettify/
  29. gerrit-reviewdb/
  30. gerrit-server/
  31. gerrit-sshd/
  32. gerrit-test-util/
  33. gerrit-util-cli/
  34. gerrit-util-http/
  35. gerrit-util-ssl/
  36. gerrit-war/
  37. lib/
  38. plugins/
  39. polygerrit-ui/
  40. ReleaseNotes/
  41. tools/
  42. website/
  43. .bazelignore
  44. .bazelproject
  45. .bazelrc
  46. .bazelversion
  47. .editorconfig
  48. .git-blame-ignore-revs
  49. .gitignore
  50. .gitmodules
  51. .gitreview
  52. .mailmap
  53. .pydevproject
  54. BUILD
  57. Jenkinsfile
  58. README.md
  60. version.bzl

Gerrit Code Review

Gerrit is a code review and project management tool for Git based projects.

Build Status


Gerrit makes reviews easier by showing changes in a side-by-side display, and allowing inline comments to be added by any reviewer.

Gerrit simplifies Git based project maintainership by permitting any authorized user to submit changes to the master Git repository, rather than requiring all approved changes to be merged in by hand by the project maintainer.


For information about how to install and use Gerrit, refer to the documentation.


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Please report bugs on the issue tracker.


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Please read the contribution guidelines.

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Gerrit is provided under the Apache License 2.0.


Install Bazel and run the following:

    git clone --recursive https://gerrit.googlesource.com/gerrit
    cd gerrit && bazel build release

Install binary packages (Deb/Rpm)

The instruction how to configure GerritForge/BinTray repositories is here

On Debian/Ubuntu run:

    apt-get update & apt-get install gerrit=<version>-<release>

NOTE: release is a counter that starts with 1 and indicates the number of packages that have been released with the same version of the software.

On CentOS/RedHat run:

    yum clean all && yum install gerrit-<version>[-<release>]

On Fedora run:

    dnf clean all && dnf install gerrit-<version>[-<release>]

Use pre-built Gerrit images on Docker

Docker images of Gerrit are available on DockerHub

To run a CentOS 7 based Gerrit image:

    docker run -p 8080:8080 gerritforge/gerrit-centos7[:version]

To run a Ubuntu 15.04 based Gerrit image:

    docker run -p 8080:8080 gerritforge/gerrit-ubuntu15.04[:version]

NOTE: release is optional. Last released package of the version is installed if the release number is omitted.