nikel questions

• IBM DB2 administration server already active , but says not
• No instance(s) of type variable(s) U exist so that void conforms to U
• Enforce Unique consumer group id in Kafka
• When are imported classes loaded in java?
• isInstance & instanceof - Why there's no generic way? [duplicate]
• maven artifact : x (managed from y)
• Why can't Kafka Producer connect to zookeeper to fetch broker metadata instead of connecting to brokers
• PCDATA vs CDATA in XML DTD
• git fetch fails due to pack-object failure
• Zookeeper sessions keep expiring...no heartbeats?

nikel answers