Java 11 JDBC support

21

Hi,

We are planning to migrate from Jdk 1.8 to 11. We use Dremio JDBC jar to connect to dremio version (Dremio-15.0.0-0be9c719.jar)
Noticed following warning during application startup:-

WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by cdjd.org.apache.calcite.avatica.com.google.protobuf.UnsafeUtil (Dremio-15.0.0-0be9c719.jar) to field java.nio.Buffer.address
WARNING: Please consider reporting this to the maintainers of cdjd.org.apache.calcite.avatica.com.google.protobuf.UnsafeUtil
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations

Wondering if you have any insight as to how to resolve this.

BR,
Preeti

22

@preetigupta

Dremio does not support JDK 11 but if your JDBC client is JDK 11 then Dremio can talk to it but the below needs to be set on the JDBC clinet on startup

-Dcdjd.io.netty.tryReflectionSetAccessible=true