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https://issues.apache.org/jira/browse/KAFKA-13613?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17510979#comment-17510979
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Guy Pascarella commented on KAFKA-13613:
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[~ChrisEgerton] The issue is only observed for running. We tend to utilize
pre-compiled binaries whenever possible. Thanks!
> Kafka Connect has a hard dependency on KeyGenerator.HmacSHA256
> --------------------------------------------------------------
>
> Key: KAFKA-13613
> URL: https://issues.apache.org/jira/browse/KAFKA-13613
> Project: Kafka
> Issue Type: Bug
> Components: KafkaConnect
> Affects Versions: 3.0.0
> Environment: RHEL 8.5
> OpenJDK 1.8.0_312 or 11
> Confluent Platform 7.0.1 (Kafka 3.0.0)
> Reporter: Guy Pascarella
> Assignee: Chris Egerton
> Priority: Major
>
> If a server is running Java 8 that has been configured for FIPS mode
> according to
> [openjdk-8-configuring_openjdk_8_on_rhel_with_fips-en-us.pdf|https://access.redhat.com/documentation/en-us/openjdk/8/pdf/configuring_openjdk_8_on_rhel_with_fips/openjdk-8-configuring_openjdk_8_on_rhel_with_fips-en-us.pdf]
> then the SunJCE provider is not available. As such the KeyGenerator
> HmacSHA256 is not available. The KeyGenerators I see available are
> * DES
> * ARCFOUR
> * AES
> * DESede
> Out of these I think AES would be most appropriate, but that's not the point
> of this issue, just including for completeness.
> When Kafka Connect is started in distributed mode on one of these servers I
> see the following stack trace
> {noformat}
> [2022-01-20 20:36:30,027] ERROR Stopping due to error
> (org.apache.kafka.connect.cli.ConnectDistributed)
> java.lang.ExceptionInInitializerError
> at
> org.apache.kafka.connect.cli.ConnectDistributed.startConnect(ConnectDistributed.java:94)
> at
> org.apache.kafka.connect.cli.ConnectDistributed.main(ConnectDistributed.java:79)
> Caused by: org.apache.kafka.common.config.ConfigException: Invalid value
> HmacSHA256 for configuration inter.worker.key.generation.algorithm:
> HmacSHA256 KeyGenerator not available
> at
> org.apache.kafka.connect.runtime.distributed.DistributedConfig.validateKeyAlgorithm(DistributedConfig.java:504)
> at
> org.apache.kafka.connect.runtime.distributed.DistributedConfig.lambda$configDef$2(DistributedConfig.java:375)
> at
> org.apache.kafka.common.config.ConfigDef$LambdaValidator.ensureValid(ConfigDef.java:1043)
> at
> org.apache.kafka.common.config.ConfigDef$ConfigKey.<init>(ConfigDef.java:1164)
> at org.apache.kafka.common.config.ConfigDef.define(ConfigDef.java:152)
> at org.apache.kafka.common.config.ConfigDef.define(ConfigDef.java:172)
> at org.apache.kafka.common.config.ConfigDef.define(ConfigDef.java:211)
> at org.apache.kafka.common.config.ConfigDef.define(ConfigDef.java:373)
> at
> org.apache.kafka.connect.runtime.distributed.DistributedConfig.configDef(DistributedConfig.java:371)
> at
> org.apache.kafka.connect.runtime.distributed.DistributedConfig.<clinit>(DistributedConfig.java:196)
> ... 2 more
> {noformat}
> It appears the
> {{org.apache.kafka.connect.runtime.distributed.DistributedConfig}} is
> triggering a validation of the hard-coded default
> {{inter.worker.key.generation.algorithm}} property, which is {{HmacSHA256}}.
> Ideally a fix would use the value from the configuration file before
> attempting to validate a default value.
> Updates [2022/01/27]: I just tested on a FIPS-enabled version of OpenJDK 11
> using the instructions at
> [configuring_openjdk_11_on_rhel_with_fips|https://access.redhat.com/documentation/en-us/openjdk/11/html-single/configuring_openjdk_11_on_rhel_with_fips/index],
> which resulted in the same issues. One workaround is to disable FIPS for
> Kafka Connect by passing in the JVM parameter {{-Dcom.redhat.fips=false}},
> however, that means Kafka Connect and all the workers are out of compliance
> for anyone required to use FIPS-enabled systems.
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