Hi All This is just an inform mail. Right now, and from the project beginning, SkyWalking java agent is supporting from JDK 1.6. But since this year(2019), a lot of libraries have abandoned the JDK 1.6 supported, and moved to JDK 1.7.
At all available releases, gRPC-java is not JDK 1.6 supported in latest release. Now, in PR[Set up the bootstrap instrumentation plugin framework], because of same reason, I have to choose old release(not too old), and as I am just using it to do simple class copy, it should be OK in the long time. But, we should notice, JDK 1.6 supported is beginning facing challenges, I hope we could begin to collect the information, how many JDK 1.6 supported requirements still there. We should be safe in 2019 and 2020 at least for JDK 1.6 supports, as bootstrap class instrumentation should mostly the last piece of SkyWalking agent core. [1] https://github.com/apache/skywalking/pull/3152 <https://github.com/apache/skywalking/pull/3152> Sheng Wu Apache Skywalking, ShardingSphere, Zipkin
