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I've peripherally known Corretto is the Amazon distribution of Java (specifically, OpenJDK), but I never really looked up what the difference between, say, the

I've peripherally known Corretto is the Amazon distribution of Java (specifically, OpenJDK), but I never really looked up what the difference between, say, the releases from AdoptOpenJDK and Corretto are. I looked it up, it looks like it's generally: 1. LTS support - adoptopenjdk doesn't do LTS 2. Patches that come from Amazon that are upstreamed to OpenJDK but appear in Corretto first since, you know, that's where Amazon develops them. Did I miss anything?

hn_20591249 5y ago
I asked an adjacent question and am also curious, great that they have provided another option for the OpenJDK community but I can’t see anything compelling that would make me consider this over Adopt.
- chrisseaton 5y ago
  > but I can’t see anything compelling that would make me consider this over Adopt All comes down to who do you trust to build and package something correctly?
- jhugo 5y ago
  If you are already paying AWS for premium support, one reason to use Corretto rather than Adoptium is that your AWS premium support plan covers Corretto as well. "If you already have an AWS Support Plan, Corretto is covered on the same basis as all other supported AWS Services and software." https://aws.amazon.com/corretto/faqs/ https://aws.amazon.com/corretto/faqs/
heelix 5y ago
Adopt OpenJDK did have the LTS releases. They rebranded last release - https://adoptium.net https://adoptium.net. The quarterly updates to Java 8, 11, and now 17 are all there, and up till then, been pulling 8/11 from Adopt OpenJDK's site. All in all, not much different. The last release was a bit of a kerfuffle, as they migrated web sites.
- jdc 5y ago
  From the Adoptium FAQ: > This is the project and brand name for the binaries that the Eclipse Foundation produces. You can think of these as the successor binaries to AdoptOpenJDK. The current LTS versions are 8, 11 and 17. Supported platforms include arm32 (Linux), aarch64 (Linux & macOS), x64 (Windows, Alpine & Linux w/ glibc) and x86 (Linux).
  - nomercy400 5y ago
    AdoptOpenJDK used to provide OpenJ9 binaries, are those gone now with Adoptium? I did find some OpenJ9 github site which mentioned they could not provide binaries any more, but I don't really understand why.
    - jdc 5y ago
      Correct, they've dropped OpenJ9 support during the rebranding.
      - jdc 5y ago
        As to the reason why, apparently Oracle revoked their TCK[0] license[1]. 0. https://en.wikipedia.org/wiki/Technology_Compatibility_Kit https://en.wikipedia.org/wiki/Technology_Compatibility_Kit 1. https://twitter.com/volker_simonis/status/1052610654669074432 https://twitter.com/volker_simonis/status/105261065466907443... See this Reddit thread for more background: https://old.reddit.com/r/java/comments/l5m3p6/eclipse_to_host_only_tck_compliant_java_se https://old.reddit.com/r/java/comments/l5m3p6/eclipse_to_hos... IBM offers OpenJ9 binaries under the Semaru name here: https://developer.ibm.com/languages/java/semeru-runtimes https://developer.ibm.com/languages/java/semeru-runtimes
- krzyk 5y ago
  LTS means active support (call/email to fix issue), what Adopt does is just builds from branches that receive commits/fixes from other vendors/people. They don't have TCK, they do their own tests on the builds. But you could probably do such builds yourself, everyone has access to openjdk github repo. I would call it more like Long Term Build.
syshum 5y ago
My Experience Corretto is easier to deploy on systems that just need the JRE seems to be a more drop in replacement to the old consumer Java8 msi installers, than the OpenJDK "offical" packages which are some what confusing.
tyingq 5y ago
3. Additional pre-built downloads for things like x64/musl, aarch32.
reidrac 5y ago
IIRC we had to move to Corretto when using AWS CodeBuild, because AWS dropped support of AdoptOpenJDK in their CodeBuild container images. So basically we use AWS distro to run tests and build our docker images, and those images use AdoptOpenJDK; which is not ideal, but so far we have been OK.
- capableweb 5y ago
  Basically, you moved to Corretto because Amazon forced you to. That's great :) I think this is a common reason for moving to a particular distribution, but also sad to see. Amazon used to be impartial and independent infrastructure provider but as they ingest more and more software, your infrastructure and software now starts to depend on Amazons software.
miked85 5y ago
Adopt OpenJDK didn't have TCK compliance - this seems to have changed with the rebranding to adoptium.
nuerow 5y ago
> I've peripherally known Corretto is the Amazon distribution of Java (specifically, OpenJDK), but I never really looked up what the difference between, say, the releases from AdoptOpenJDK and Corretto are. (...) Did I miss anything? According to [1], Amazon Corretor is a OpenJDK build which is: * maintained by Amazon (back ported bug fixes, patches), * includes Amazon's custom crypto provider optimized for AWS, * Optimized builds for Amazon's Linux distro, Amazon Linux 2. [1] https://whichjdk.com/#amazon-corretto https://whichjdk.com/#amazon-corretto

hn_20591249 5y ago

I asked an adjacent question and am also curious, great that they have provided another option for the OpenJDK community but I can’t see anything compelling that would make me consider this over Adopt.

chrisseaton 5y ago
> but I can’t see anything compelling that would make me consider this over Adopt All comes down to who do you trust to build and package something correctly?
jhugo 5y ago
If you are already paying AWS for premium support, one reason to use Corretto rather than Adoptium is that your AWS premium support plan covers Corretto as well. "If you already have an AWS Support Plan, Corretto is covered on the same basis as all other supported AWS Services and software." https://aws.amazon.com/corretto/faqs/ https://aws.amazon.com/corretto/faqs/

heelix 5y ago

Adopt OpenJDK did have the LTS releases. They rebranded last release - https://adoptium.net https://adoptium.net. The quarterly updates to Java 8, 11, and now 17 are all there, and up till then, been pulling 8/11 from Adopt OpenJDK's site. All in all, not much different. The last release was a bit of a kerfuffle, as they migrated web sites.

jdc 5y ago
From the Adoptium FAQ: > This is the project and brand name for the binaries that the Eclipse Foundation produces. You can think of these as the successor binaries to AdoptOpenJDK. The current LTS versions are 8, 11 and 17. Supported platforms include arm32 (Linux), aarch64 (Linux & macOS), x64 (Windows, Alpine & Linux w/ glibc) and x86 (Linux).
- nomercy400 5y ago
  AdoptOpenJDK used to provide OpenJ9 binaries, are those gone now with Adoptium? I did find some OpenJ9 github site which mentioned they could not provide binaries any more, but I don't really understand why.
  - jdc 5y ago
    Correct, they've dropped OpenJ9 support during the rebranding.
    - jdc 5y ago
      As to the reason why, apparently Oracle revoked their TCK[0] license[1]. 0. https://en.wikipedia.org/wiki/Technology_Compatibility_Kit https://en.wikipedia.org/wiki/Technology_Compatibility_Kit 1. https://twitter.com/volker_simonis/status/1052610654669074432 https://twitter.com/volker_simonis/status/105261065466907443... See this Reddit thread for more background: https://old.reddit.com/r/java/comments/l5m3p6/eclipse_to_host_only_tck_compliant_java_se https://old.reddit.com/r/java/comments/l5m3p6/eclipse_to_hos... IBM offers OpenJ9 binaries under the Semaru name here: https://developer.ibm.com/languages/java/semeru-runtimes https://developer.ibm.com/languages/java/semeru-runtimes
krzyk 5y ago
LTS means active support (call/email to fix issue), what Adopt does is just builds from branches that receive commits/fixes from other vendors/people. They don't have TCK, they do their own tests on the builds. But you could probably do such builds yourself, everyone has access to openjdk github repo. I would call it more like Long Term Build.

syshum 5y ago

My Experience Corretto is easier to deploy on systems that just need the JRE seems to be a more drop in replacement to the old consumer Java8 msi installers, than the OpenJDK "offical" packages which are some what confusing.

tyingq 5y ago

3. Additional pre-built downloads for things like x64/musl, aarch32.

reidrac 5y ago

IIRC we had to move to Corretto when using AWS CodeBuild, because AWS dropped support of AdoptOpenJDK in their CodeBuild container images. So basically we use AWS distro to run tests and build our docker images, and those images use AdoptOpenJDK; which is not ideal, but so far we have been OK.

capableweb 5y ago
Basically, you moved to Corretto because Amazon forced you to. That's great :) I think this is a common reason for moving to a particular distribution, but also sad to see. Amazon used to be impartial and independent infrastructure provider but as they ingest more and more software, your infrastructure and software now starts to depend on Amazons software.

miked85 5y ago

Adopt OpenJDK didn't have TCK compliance - this seems to have changed with the rebranding to adoptium.

nuerow 5y ago

> I've peripherally known Corretto is the Amazon distribution of Java (specifically, OpenJDK), but I never really looked up what the difference between, say, the releases from AdoptOpenJDK and Corretto are. (...) Did I miss anything? According to [1], Amazon Corretor is a OpenJDK build which is: * maintained by Amazon (back ported bug fixes, patches), * includes Amazon's custom crypto provider optimized for AWS, * Optimized builds for Amazon's Linux distro, Amazon Linux 2. [1] https://whichjdk.com/#amazon-corretto https://whichjdk.com/#amazon-corretto