Question

在Wildfly中使用HttpComponents 4.3.6运行应用程序时出现以下错误。我该如何解决这个问题？

Caused by: java.lang.NoSuchFieldError: INSTANCE
at org.apache.http.impl.io.DefaultHttpRequestWriterFactory.<init>(DefaultHttpRequestWriterFactory.java:52) [httpcore-4.3.3.jar:4.3.3]
at org.apache.http.impl.io.DefaultHttpRequestWriterFactory.<init>(DefaultHttpRequestWriterFactory.java:56) [httpcore-4.3.3.jar:4.3.3]
at org.apache.http.impl.io.DefaultHttpRequestWriterFactory.<clinit>(DefaultHttpRequestWriterFactory.java:46) [httpcore-4.3.3.jar:4.3.3]
at org.apache.http.impl.conn.ManagedHttpClientConnectionFactory.<init>(ManagedHttpClientConnectionFactory.java:72) [httpclient-4.3.6.jar:4.3.6]
at org.apache.http.impl.conn.ManagedHttpClientConnectionFactory.<init>(ManagedHttpClientConnectionFactory.java:84) [httpclient-4.3.6.jar:4.3.6]
at org.apache.http.impl.conn.ManagedHttpClientConnectionFactory.<clinit>(ManagedHttpClientConnectionFactory.java:59) [httpclient-4.3.6.jar:4.3.6]
at org.apache.http.impl.conn.PoolingHttpClientConnectionManager$InternalConnectionFactory.<init>(PoolingHttpClientConnectionManager.java:494) [httpclient-4.3.6.jar:4.3.6]
at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.<init>(PoolingHttpClientConnectionManager.java:149) [httpclient-4.3.6.jar:4.3.6]
at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.<init>(PoolingHttpClientConnectionManager.java:138) [httpclient-4.3.6.jar:4.3.6]
at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.<init>(PoolingHttpClientConnectionManager.java:114) [httpclient-4.3.6.jar:4.3.6]
at org.apache.http.impl.client.HttpClientBuilder.build(HttpClientBuilder.java:726) [httpclient-4.3.6.jar:4.3.6]
at org.apache.http.impl.client.HttpClients.createDefault(HttpClients.java:58) [httpclient-4.3.6.jar:4.3.6]

Answer 1

关于该主题的每篇文章都说这是因为不同版本的HttpComponents之间存在冲突。在我的情况下，我导入到我的应用程序的版本与Wildfly提供的版本之间存在冲突。

要解决此问题，您需要一个名为WEB-INF / jboss-deployment-structure.xml的文件，其中包含以下内容：

<jboss-deployment-structure>
<deployment>
    <exclusions>
        <module name="org.apache.httpcomponents" />
    </exclusions>
</deployment>

这将阻止wildfly加载旧版本并干扰您的新版本。

有关详细信息，请参阅https://docs.jboss.org/author/display/WFLY8/Class+Loading+in+WildFly。

java.lang.NoSuchFieldError：Apache HttpComonents和Wildfly中的INSTANCE

1 个答案: