Chetan Mehrotra created SLING-3747:
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Summary: Provide a way to signal Jcr Installer to pause and resume
scanning
Key: SLING-3747
URL: https://issues.apache.org/jira/browse/SLING-3747
Project: Sling
Issue Type: New Feature
Components: Installer
Reporter: Chetan Mehrotra
Currently Sling Installer JCR Provider would listen for observation event and
would perform a rescan every 500 msec upon receiving any observation event.
This at times cause issue when large number of bundles get updated in
repository say via installation of bug fixing content package. Further if same
content package also updates the repository bundle then it causes issues as
repository bundle might get updated midway while content package is still being
deployed
Based on [~fmeschbe] suggestion this can be done via introducing a signalling
mechanism between component which installs package and JCR Installer. It would
work something like this
# JCR Installer would listen to changes done to property
{{/system/sling/installer/jcr/pauseInstallation}}
# Package installer would set the above flag to true before installing the
package and reset it back to false post installation
# If JCR Installer detects that flag is set to true it would not scan the watch
folders untill it get reset back to false
This should also address the issue in cluster deployment
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