fix: switch to pekko

[pjfanning]

What changes were proposed in this PR?

• Switch from non FOSS Akka lib to Pekko

Any related issues, documentation, discussions?

• Relates to Replace Akka with Apache Pekko #3237

How was this PR tested?

Was this PR authored or co-authored using generative AI tooling?

[Copilot]

Pull Request Overview

This PR migrates the codebase from Akka to Apache Pekko, addressing licensing and long-term sustainability concerns. Pekko is an Apache-licensed fork of Akka that continues development under the Apache Software Foundation.

• Updates all Akka package imports to Pekko equivalents across the codebase
• Migrates configuration files from Akka to Pekko naming conventions
• Updates build dependencies from Akka to Pekko libraries, including serialization frameworks

Reviewed Changes

Copilot reviewed 42 out of 42 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
common/config/src/main/scala/org/apache/amber/config/AkkaConfig.scala	Updated comment to reference Pekko instead of Akka
common/config/src/main/resources/cluster.conf	Migrated configuration from Akka to Pekko naming, including logger and serializer package paths
amber/src/test/scala/org/apache/amber/engine/faulttolerance/*.scala	Updated test imports from Akka to Pekko
amber/src/test/scala/org/apache/amber/engine/e2e/*.scala	Updated test imports from Akka to Pekko
amber/src/test/scala/org/apache/amber/engine/architecture/**/*.scala	Updated test imports from Akka to Pekko
amber/src/main/scala/org/apache/texera/web/**/*.scala	Updated actor imports from Akka to Pekko
amber/src/main/scala/org/apache/amber/engine/common/*.scala	Updated imports and configuration strings from Akka to Pekko
amber/src/main/scala/org/apache/amber/engine/architecture/**/*.scala	Updated imports from Akka to Pekko across architecture components
amber/src/main/scala/org/apache/amber/clustering/*.scala	Updated cluster management imports from Akka to Pekko
amber/build.sbt	Migrated build dependencies from Akka 2.6.21 to Pekko 1.2.1 and updated Kryo serialization libraries

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[chenlica]

Thanks @pjfanning .

@aglinxinyuan Can you review it?

[aglinxinyuan]

Thanks @pjfanning .

@aglinxinyuan Can you review it?

I'm not familiar with akka. @Yicong-Huang and @shengquan-ni can review it.

[Yicong-Huang]

Thanks for the PR. I don't see obvious issues. Maybe @shengquan-ni can take another look.

[chenlica]

@shengquan-ni Can you take a look?

[shengquan-ni]

The code changes look good to me. However, I want them to be tested. As I don’t have a running Texera dev env, @aglinxinyuan can you do a test for basic features like pause,resume,kill and also advanced features like UDF debugging, code update?

[shengquan-ni]

We also need to test the multi-node clustering feature for Amber, maybe @bobbai00 can help test that.

[chenlica]

Thanks, @shengquan-ni . @Xiao-zhen-Liu Can you do some testing?

[Xiao-zhen-Liu]

I tested basic features on several workflows, including pause, resume, and kill, and they work as expected. Code debugging also works as expected. Code update cannot be tested as we disabled reconfiguration in #2970. For multi-node clustering feature, I have never tried it before and I do not have the context, but @bobbai00 should be able to test it.

[chenlica]

@bobbai00 is available in the next few days. @aicam can you test it in a multi-node setting?

I will start a discussion about #2970.