Probably because of memory usage and garbage collection and the fact that java needs to be installed on most systems whereas C++ needs no dependencies and python comes preinstalled on the usual linux server (probably not python3 but i assume it will be some years before bind10 sees adoption for such critical infrastructure). Also he mentions specialized data structures and memory management.
Atleast i wouldn't sleep well if i know that the heart of the internet was running Java :P
Those implementations have quite weak garbage collection implementations (boehm conservative, but I'm not sure), which would just kill the performance. Hotspot JVM has a very sofisticated Incremental Generational garbage collector, which does have a _very_ good performance.
I'm pretty sure they had their reasons for not using Java (I actually do have mine too), but, garbage collection is not one of those.
Indeed. I was arguing against the 'you need the JVM as a dependency'. But then Go is all the hype these days, and people also use Go for network applications, which also has a weak GC ;).
Go does generate a _LOT_ less garbage then Java, you can control the layout of your structures. That why its gc has less impact on performance then the JVM´s one.
Which ones? I'd say DNS is probably the most important parts. I also don't believe that core routing equipment is running in the JVM.
Apparently you are talking about the "Web", i was talking about the internet or networks in general.. I'm aware that tomcat may have a very large installation base. There is no use for your tomcat if the DNS is down, though :P
Very cool, but not really related to core internet functionality.
The truth is, Java is viewed as "not Unix friendly" by many people, whether deserved or not. I suspect the ISC folks fall squarely into this camp. My personal and thus purely anecdotal experience is near-universal hostility from network admins.
Despite this, there is a fair amount of network management software written in Java. OpenNMS and Cisco Prime Networks (an absolute beast) both spring to mind.
Neither is a particularly viable option: GCJ is nearly a decade behind mainline Java in terms of feature support. VMKit seems cool but I'm not sure about the maturity of the project.
