Is write access to directories such as /tmp, /var/log, or /run required when using the Red Hat OpenJDK 1.8 container image with "readOnlyRootFilesystem: true"?

Issue

Currently operating containers based on the Red Hat-provided OpenJDK 1.8 container image.

When applying the "readOnlyRootFilesystem: true" security context setting to these containers,

there is a need to confirm whether write access to any root filesystem paths such as /tmp, /var/log, or /run is required by the image itself or by the OpenJDK runtime.

Are these write permissions required for base image or OpenJDK operations? (excluding application-level write behavior)

Does this setting result in any unsupported behavior or known issues according to Red Hat documentation or support policy?