An illegal reflective access operation has occurred in cb-datagrid startup.out

Products

• Carbon Black EDR (formerly Cb Response)

Issue/Introduction

During startup of cb-datagrid there is a series of warnings logged in /var/log/cb/datagrid/startup.out:

WARNING: Hazelcast is starting in a Java modular environment (Java 9 and newer) but without proper access to required Java packages. Use additional Java arguments to provide Hazelcast access to Java internal API. The internal API access is used to get the best performance results. Arguments to be used:
 --add-modules java.se --add-exports java.base/jdk.internal.ref=ALL-UNNAMED --add-opens java.base/java.lang=ALL-UNNAMED --add-opens java.base/java.nio=ALL-UNNAMED --add-opens java.base/sun.nio.ch=ALL-UNNAMED --add-opens java.management/sun.management=ALL-UNNAMED --add-opens jdk.management/com.sun.management.internal=ALL-UNNAMED
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.hazelcast.internal.networking.nio.SelectorOptimizer (file:/usr/share/cb/datagrid/lib/hazelcast-all-3.12.13.jar) to field sun.nio.ch.SelectorImpl.selectedKeys
WARNING: Please consider reporting this to the maintainers of com.hazelcast.internal.networking.nio.SelectorOptimizer
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release

Environment

• EDR Server: Version 7.0+

Cause

When running on EDR clusters utilizing IPv4 the startup flags --add-exports and --add-opens are not being used

Resolution

The issue should be resolved in EDR Server version 7.9.3 so the startup flags are being used for IPv4 and IPv6 EDR installations.

Additional Information

The java is only warning about this coding practice and not blocking any functionality, so the warnings are informational.