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From Viktor Jevdokimov <>
Subject RE: Why do Datastax docs recommend Java 6?
Date Wed, 06 Feb 2013 07:13:39 GMT
I would prefer Oracle to own an Azul's Zing JVM over any other (GC) to provide it for free
for anyone :)

Best regards / Pagarbiai
Viktor Jevdokimov
Senior Developer

Phone: +370 5 212 3063, Fax +370 5 261 0453
J. Jasinskio 16C, LT-01112 Vilnius, Lithuania
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From: []
Sent: Wednesday, February 06, 2013 02:23
Subject: Re: Why do Datastax docs recommend Java 6?

Oracle now owns the sun hotspot team, which is inarguably the highest powered java vm team
in the world. Its still really the epicenter of all java vm development.
Sent from my Verizon Wireless BlackBerry
From: "Ilya Grebnov" <<>>
Date: Tue, 5 Feb 2013 14:09:33 -0800
To: <<>>
Subject: RE: Why do Datastax docs recommend Java 6?

Also, what is particular reason to use Oracle JDK over Open JDK? Sorry, I could not find this
information online.

From: Michael Kjellman []
Sent: Tuesday, February 05, 2013 7:29 AM
Subject: Re: Why do Datastax docs recommend Java 6?

There have been tons of threads/convos on this.

In the early days of Java 7 it was pretty unstable and there was pretty much no convincing
reason to use Java 7 over Java 6.

Now that Java 7 has stabilized and Java 6 is EOL it's a reasonable decision to use Java 7
and we do it in production with no issues to speak of.

That being said there was one potential situation we've seen as a community where bootstrapping
new node was using 3x more CPU and getting significantly less throughput. However, reproducing
this consistently never happened AFAIK.

I think until more people use Java 7 in production and prove it doesn't cause any additional
bugs/performance issues Datastax will update their docs. Until now I'd say it's a safe bet
to use Java 7 with Vanilla C* 1.2.1. I hope this helps!


From: Baron Schwartz <<>>
Reply-To: "<>" <<>>
Date: Tuesday, February 5, 2013 7:21 AM
To: "<>" <<>>
Subject: Why do Datastax docs recommend Java 6?

The Datastax docs repeatedly say (e.g.
that Java 7 is not recommended, but they don't say why. It would be helpful to know this.
Does anyone know?

The same documentation is referenced from the Cassandra wiki, for example,

- Baron

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