Features

COOL FEATURE. Provide new agent package, instead of the uber jar file. This is a complex feature, which is provided in many commercial APM product. Now skywalking has it.(PMC)
Support multi plugin definitions targeting the same class. (PMC)
Support framework version identification.(PMC)
Provide a new JDBC plugins mechanism, and refactor all JDBC plugins, for supporting more JDBC usages.(PMC)
Provide PostgreSQL plugin.(PMC)
Remove the literal strings in collector metric tables, reduce the disk/network/memory cost.(PMC)
Provide standalone mode for collector. Only requirement is JDK 1.8. Of course, this mode prepared for quick-start, preview, demonstration or the lowest hardware requirements.(PMC)
Support H2 storage in collector.(PMC & @clevertension)
Provide Spymemcached(Memcached Client) Plugin. (@IluckySi)
Support more annotations since Spring 4.3. (@clevertension)
Upgrade byte-buddy to 1.7.6 (@IluckySi)
Name threads created by agent. All thread names started with SkywalkingAgent-. (@zhangkewei)
Provide sharding-jdbc 1.5 plugin by Dangdang official team. (@hanahmily)
Provide XMemcached(Memcached Client) 2.x plugin. (@IluckySi)

Bugs

Jetty 9 plugin doesn't work. (PMC)
Lost the segments in UI which have no entry span.(PMC)
GRPCChannelManager exits unexpectedly caused by IndexOutOfBoundsException. (@zhangkewei)