为什么我会收到此 "split package" 警告？

Question

我正在构建一个 .kar 文件，但是当我运行 mvn package 我收到这个错误：

[INFO] --- maven-bundle-plugin:2.4.0:bundle (default-bundle) @ common ---
[WARNING] Bundle se.eman.path.to.my.package:common:bundle:1.0.0-SNAPSHOT : Split package, multiple jars provide the same package:com/sun/xml/bind/v2
Use Import/Export Package directive -split-package:=(merge-first|merge-last|error|first) to get rid of this warning
Package found in   [Jar:jaxb-impl, Jar:jaxb-core]
Class path         [Jar:., Jar:camel-core, Jar:slf4j-api, Jar:jaxb-impl, Jar:jaxb-core, Jar:jaxb-api, Jar:istack-commons-runtime, Jar:FastInfoset, Jar:jsr173_api, Jar:camel-groovy, Jar:groovy-all, Jar:commons-logging, Jar:slf4j-log4j12, 
Jar:log4j]
[WARNING] Bundle se.eman.path.to.my.package:common:bundle:1.0.0-SNAPSHOT : Split package, multiple jars provide the same package:com/sun/istack
Use Import/Export Package directive -split-package:=(merge-first|merge-last|error|first) to get rid of this warning
Package found in   [Jar:jaxb-core, Jar:istack-commons-runtime]
Class path         [Jar:., Jar:camel-core, Jar:slf4j-api, Jar:jaxb-impl, Jar:jaxb-core, Jar:jaxb-api, Jar:istack-commons-runtime, Jar:FastInfoset, Jar:jsr173_api, Jar:camel-groovy, Jar:groovy-all, Jar:commons-logging, Jar:slf4j-log4j12, 
Jar:log4j]
[WARNING] Bundle se.eman.path.to.my.package:common:bundle:1.0.0-SNAPSHOT : Split package, multiple jars provide the same package:com/sun/xml/bind/v2/model/impl
Use Import/Export Package directive -split-package:=(merge-first|merge-last|error|first) to get rid of this warning
Package found in   [Jar:jaxb-impl, Jar:jaxb-core]
Class path         [Jar:., Jar:camel-core, Jar:slf4j-api, Jar:jaxb-impl, Jar:jaxb-core, Jar:jaxb-api, Jar:istack-commons-runtime, Jar:FastInfoset, Jar:jsr173_api, Jar:camel-groovy, Jar:groovy-all, Jar:commons-logging, Jar:slf4j-log4j12, 
Jar:log4j]
[WARNING] Bundle se.eman.path.to.my.package:common:bundle:1.0.0-SNAPSHOT : Split package, multiple jars provide the same package:com/sun/xml/bind/marshaller
Use Import/Export Package directive -split-package:=(merge-first|merge-last|error|first) to get rid of this warning
Package found in   [Jar:jaxb-impl, Jar:jaxb-core]
Class path         [Jar:., Jar:camel-core, Jar:slf4j-api, Jar:jaxb-impl, Jar:jaxb-core, Jar:jaxb-api, Jar:istack-commons-runtime, Jar:FastInfoset, Jar:jsr173_api, Jar:camel-groovy, Jar:groovy-all, Jar:commons-logging, Jar:slf4j-log4j12, 
Jar:log4j]
[WARNING] Bundle se.eman.path.to.my.package:common:bundle:1.0.0-SNAPSHOT : Split package, multiple jars provide the same package:com/sun/xml/bind/v2/runtime/unmarshaller
Use Import/Export Package directive -split-package:=(merge-first|merge-last|error|first) to get rid of this warning
Package found in   [Jar:jaxb-impl, Jar:jaxb-core]
Class path         [Jar:., Jar:camel-core, Jar:slf4j-api, Jar:jaxb-impl, Jar:jaxb-core, Jar:jaxb-api, Jar:istack-commons-runtime, Jar:FastInfoset, Jar:jsr173_api, Jar:camel-groovy, Jar:groovy-all, Jar:commons-logging, Jar:slf4j-log4j12, 
Jar:log4j]
[WARNING] Bundle se.eman.path.to.my.package:common:bundle:1.0.0-SNAPSHOT : Split package, multiple jars provide the same package:com/sun/xml/bind/util
Use Import/Export Package directive -split-package:=(merge-first|merge-last|error|first) to get rid of this warning
Package found in   [Jar:jaxb-impl, Jar:jaxb-core]
Class path         [Jar:., Jar:camel-core, Jar:slf4j-api, Jar:jaxb-impl, Jar:jaxb-core, Jar:jaxb-api, Jar:istack-commons-runtime, Jar:FastInfoset, Jar:jsr173_api, Jar:camel-groovy, Jar:groovy-all, Jar:commons-logging, Jar:slf4j-log4j12, 
Jar:log4j]
[WARNING] Bundle se.eman.path.to.my.package:common:bundle:1.0.0-SNAPSHOT : Split package, multiple jars provide the same package:com/sun/xml/bind/unmarshaller
Use Import/Export Package directive -split-package:=(merge-first|merge-last|error|first) to get rid of this warning
Package found in   [Jar:jaxb-impl, Jar:jaxb-core]
Class path         [Jar:., Jar:camel-core, Jar:slf4j-api, Jar:jaxb-impl, Jar:jaxb-core, Jar:jaxb-api, Jar:istack-commons-runtime, Jar:FastInfoset, Jar:jsr173_api, Jar:camel-groovy, Jar:groovy-all, Jar:commons-logging, Jar:slf4j-log4j12, 
Jar:log4j]
[WARNING] Bundle se.eman.path.to.my.package:common:bundle:1.0.0-SNAPSHOT : Split package, multiple jars provide the same package:com/sun/istack/logging
Use Import/Export Package directive -split-package:=(merge-first|merge-last|error|first) to get rid of this warning
Package found in   [Jar:jaxb-core, Jar:istack-commons-runtime]
Class path         [Jar:., Jar:camel-core, Jar:slf4j-api, Jar:jaxb-impl, Jar:jaxb-core, Jar:jaxb-api, Jar:istack-commons-runtime, Jar:FastInfoset, Jar:jsr173_api, Jar:camel-groovy, Jar:groovy-all, Jar:commons-logging, Jar:slf4j-log4j12, 
Jar:log4j]
[WARNING] Bundle se.eman.path.to.my.package:common:bundle:1.0.0-SNAPSHOT : Split package, multiple jars provide the same package:com/sun/xml/bind/api
Use Import/Export Package directive -split-package:=(merge-first|merge-last|error|first) to get rid of this warning
Package found in   [Jar:jaxb-impl, Jar:jaxb-core]
Class path         [Jar:., Jar:camel-core, Jar:slf4j-api, Jar:jaxb-impl, Jar:jaxb-core, Jar:jaxb-api, Jar:istack-commons-runtime, Jar:FastInfoset, Jar:jsr173_api, Jar:camel-groovy, Jar:groovy-all, Jar:commons-logging, Jar:slf4j-log4j12, 
Jar:log4j]
[WARNING] Bundle se.eman.path.to.my.package:common:bundle:1.0.0-SNAPSHOT : Split package, multiple jars provide the same package:com/sun/xml/bind
Use Import/Export Package directive -split-package:=(merge-first|merge-last|error|first) to get rid of this warning
Package found in   [Jar:jaxb-impl, Jar:jaxb-core]
Class path         [Jar:., Jar:camel-core, Jar:slf4j-api, Jar:jaxb-impl, Jar:jaxb-core, Jar:jaxb-api, Jar:istack-commons-runtime, Jar:FastInfoset, Jar:jsr173_api, Jar:camel-groovy, Jar:groovy-all, Jar:commons-logging, Jar:slf4j-log4j12, 
Jar:log4j]
[WARNING] Bundle se.eman.path.to.my.package:common:bundle:1.0.0-SNAPSHOT : Split package, multiple jars provide the same package:com/sun/xml/bind/v2/util
Use Import/Export Package directive -split-package:=(merge-first|merge-last|error|first) to get rid of this warning
Package found in   [Jar:jaxb-impl, Jar:jaxb-core]
Class path         [Jar:., Jar:camel-core, Jar:slf4j-api, Jar:jaxb-impl, Jar:jaxb-core, Jar:jaxb-api, Jar:istack-commons-runtime, Jar:FastInfoset, Jar:jsr173_api, Jar:camel-groovy, Jar:groovy-all, Jar:commons-logging, Jar:slf4j-log4j12, 
Jar:log4j]
[WARNING] Bundle se.eman.path.to.my.package:common:bundle:1.0.0-SNAPSHOT : Split package, multiple jars provide the same package:com/sun/xml/bind/v2/runtime
Use Import/Export Package directive -split-package:=(merge-first|merge-last|error|first) to get rid of this warning
Package found in   [Jar:jaxb-impl, Jar:jaxb-core]
Class path         [Jar:., Jar:camel-core, Jar:slf4j-api, Jar:jaxb-impl, Jar:jaxb-core, Jar:jaxb-api, Jar:istack-commons-runtime, Jar:FastInfoset, Jar:jsr173_api, Jar:camel-groovy, Jar:groovy-all, Jar:commons-logging, Jar:slf4j-log4j12, 
Jar:log4j]
[WARNING] Bundle se.eman.path.to.my.package:common:bundle:1.0.0-SNAPSHOT : Split package, multiple jars provide the same package:com/sun/istack/localization
Use Import/Export Package directive -split-package:=(merge-first|merge-last|error|first) to get rid of this warning
Package found in   [Jar:jaxb-core, Jar:istack-commons-runtime]
Class path         [Jar:., Jar:camel-core, Jar:slf4j-api, Jar:jaxb-impl, Jar:jaxb-core, Jar:jaxb-api, Jar:istack-commons-runtime, Jar:FastInfoset, Jar:jsr173_api, Jar:camel-groovy, Jar:groovy-all, Jar:commons-logging, Jar:slf4j-log4j12, 
Jar:log4j]
[WARNING] Bundle se.eman.path.to.my.package:common:bundle:1.0.0-SNAPSHOT : Split package, multiple jars provide the same package:com/sun/xml/bind/v2/model/annotation
Use Import/Export Package directive -split-package:=(merge-first|merge-last|error|first) to get rid of this warning
Package found in   [Jar:jaxb-impl, Jar:jaxb-core]
Class path         [Jar:., Jar:camel-core, Jar:slf4j-api, Jar:jaxb-impl, Jar:jaxb-core, Jar:jaxb-api, Jar:istack-commons-runtime, Jar:FastInfoset, Jar:jsr173_api, Jar:camel-groovy, Jar:groovy-all, Jar:commons-logging, Jar:slf4j-log4j12, 
Jar:log4j]

我的 pom .xml:

<packaging>bundle</packaging>
<build>
    <plugins>
        <plugin>
            <groupId>org.apache.felix</groupId>
            <artifactId>maven-bundle-plugin</artifactId>
            <version>2.4.0</version>
            <extensions>true</extensions>
            <configuration>
                <instructions>
                    <Bundle-SymbolicName>${project.groupId}.common</Bundle-SymbolicName>
                    <Bundle-Name>${project.name}</Bundle-Name>
                    <Bundle-Version>${project.version}</Bundle-Version>
                    <!-- TODO: Insert your needed exports here -->
                    <Export-Package>*,se.eman.path.to.my.package.*</Export-Package>
                </instructions>
            </configuration>
        </plugin>
    </plugins>
</build>
<dependencies>
    <dependency>
        <groupId>org.apache.camel</groupId>
        <artifactId>camel-core</artifactId>
        <version>${camel-version}</version>
    </dependency>
    <dependency>
        <groupId>org.apache.camel</groupId>
        <artifactId>camel-groovy</artifactId>
        <version>${camel-version}</version>
    </dependency>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>${junit.version}</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.apache.camel</groupId>
        <artifactId>camel-test</artifactId>
        <version>${camel-version}</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.apache.camel</groupId>
        <artifactId>camel-test-spring</artifactId>
        <version>${camel-version}</version>
        <scope>test</scope>
    </dependency>
</dependencies>

我只是想不通是什么导致了这些错误。当我阅读有关 split package 的文章时，我得到了非常有用的建议，即应该避免 split package。是的...我无法控制 jaxb-impl、jaxb-core 或 com/sun/*.

关于如何解决此问题的任何想法？

Answer 1

Export-Package 的默认值是 {local-packages} 而不是 *

使用指令 Export-Package: *，您要求 bnd 导出项目的所有依赖项。

删除 * 或使用 {local-packages}

编辑 :

请注意，您只能从捆绑包中导出 public API。其他一切都应该保密。默认情况下，maven-bundle-plugin 导出所有包，除了包含 impl 或 internal 的包。如果可以，你应该坚持这个约定并省略 Export-Package 指令，或者明确导出你的 public 包。

Answer 2

请检查http://mail-archives.apache.org/mod_mbox/felix-users/200709.mbox/%3CF034315F398DE24C9A76FB51DAFAB709FC9638@nets13ga.ww300.siemens.net%3E

示例对我有用：

<Export-Package>
  org.hibernate.*;version=${pkgVersion};-split-package:=merge-last                       

</Export-Package>

同样的答案在； Use third party artifacts with split packages in Maven and Java 9

为什么我会收到此 "split package" 警告？

Why am I getting this "split package" warning?

osgi

maven

apache-karaf