Jeffrey Starker created AMQ-4131:
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Summary: Duplicated classes in activemq-core and activemq-protobuf
artifacts
Key: AMQ-4131
URL: https://issues.apache.org/jira/browse/AMQ-4131
Project: ActiveMQ
Issue Type: Bug
Affects Versions: 5.7.0
Environment: Maven
Reporter: Jeffrey Starker
Priority: Minor
When adding activemq-core as a dependency in a java maven project, the
activemq-core pulls in a dependency for activemq-protobuf. However, the
activemq-core artifact duplicates all of the classes located in the
activemq-protobuf.
Doing a diff between the two jars for activemq-spring-5.7.0.jar and
activemq-protobuf-1.1.jar, the following classes are duplicated:
{noformat}
[WARNING] Found duplicate classes in
[org.apache.activemq:activemq-core:5.7.0,org.apache.activemq.protobuf:activemq-protobuf:1.1]
:
[WARNING] org.apache.activemq.protobuf.AsciiBuffer
[WARNING] org.apache.activemq.protobuf.BaseMessage
[WARNING] org.apache.activemq.protobuf.Buffer
[WARNING] org.apache.activemq.protobuf.BufferInputStream
[WARNING] org.apache.activemq.protobuf.BufferOutputStream
[WARNING] org.apache.activemq.protobuf.CodedInputStream
[WARNING] org.apache.activemq.protobuf.CodedOutputStream
[WARNING] org.apache.activemq.protobuf.DeferredDecodeMessage
[WARNING] org.apache.activemq.protobuf.InvalidProtocolBufferException
[WARNING] org.apache.activemq.protobuf.Message
[WARNING] org.apache.activemq.protobuf.MessageBuffer
[WARNING] org.apache.activemq.protobuf.MessageBufferSupport
[WARNING] org.apache.activemq.protobuf.PBMessage
[WARNING] org.apache.activemq.protobuf.UTF8Buffer
[WARNING] org.apache.activemq.protobuf.UninitializedMessageException
[WARNING] org.apache.activemq.protobuf.WireFormat
[WARNING] org.apache.activemq.protobuf.compiler.AltJavaGenerator
[WARNING] org.apache.activemq.protobuf.compiler.CommandLineSupport
[WARNING] org.apache.activemq.protobuf.compiler.CompilerException
[WARNING] org.apache.activemq.protobuf.compiler.EnumDescriptor
[WARNING] org.apache.activemq.protobuf.compiler.EnumFieldDescriptor
[WARNING] org.apache.activemq.protobuf.compiler.ExtensionsDescriptor
[WARNING] org.apache.activemq.protobuf.compiler.FieldDescriptor
[WARNING] org.apache.activemq.protobuf.compiler.IntrospectionSupport
[WARNING] org.apache.activemq.protobuf.compiler.JavaGenerator
[WARNING] org.apache.activemq.protobuf.compiler.MessageDescriptor
[WARNING] org.apache.activemq.protobuf.compiler.MethodDescriptor
[WARNING] org.apache.activemq.protobuf.compiler.OptionDescriptor
[WARNING] org.apache.activemq.protobuf.compiler.ParserSupport
[WARNING] org.apache.activemq.protobuf.compiler.ProtoDescriptor
[WARNING] org.apache.activemq.protobuf.compiler.ProtoMojo
[WARNING] org.apache.activemq.protobuf.compiler.ServiceDescriptor
[WARNING] org.apache.activemq.protobuf.compiler.TextFormat
[WARNING] org.apache.activemq.protobuf.compiler.TypeDescriptor
[WARNING] org.apache.activemq.protobuf.compiler.parser.ParseException
[WARNING] org.apache.activemq.protobuf.compiler.parser.ProtoParser
[WARNING] org.apache.activemq.protobuf.compiler.parser.ProtoParserConstants
[WARNING] org.apache.activemq.protobuf.compiler.parser.ProtoParserTokenManager
[WARNING] org.apache.activemq.protobuf.compiler.parser.SimpleCharStream
[WARNING] org.apache.activemq.protobuf.compiler.parser.Token
[WARNING] org.apache.activemq.protobuf.compiler.parser.TokenMgrError
{noformat}
activemq-core is currently packaged incorrectly because of this. This will
cause classloader issues as these classes are duplicated. However, luckily the
classes are identical, but if something changes down the road it could cause
unexpected behavior.
Current workaround:
{code:xml}
<dependency>
<groupId>org.apache.activemq</groupId>
<artifactId>activemq-core</artifactId>
<version>5.7.0</version>
<exclusions>
<exclusion>
<artifactId>activemq-protobuf</artifactId>
<groupId>org.apache.activemq.protobuf</groupId>
</exclusion>
</exclusions>
</dependency>
{code}
Suggested fix is to remove the duplicated classes from activemq-core and
instead bring them in through the activemq-protobuf dependency.
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