Micronaut：使用领事依赖项构建本地映像不起作用

Question

我试图构建一个micronaut(V1.0.4)应用程序的本机映像。

此应用程序使用Consul作为服务发现。

我使用--features选项创建了应用程序：

$ mn create-app my-app --features discovery-consul --features graal-native-image --build maven

$ ./docker-build.sh 

error: No instances are allowed in the image heap for a class that is initialized or reinitialized at image runtime: 
sun.security.provider.NativePRNG
Detailed message:
Error: No instances are allowed in the image heap for a class that is initialized or reinitialized at image runtime: sun.security.provider.NativePRNG
Trace:  object java.security.SecureRandom
    method com.sun.jndi.dns.DnsClient.query(DnsName, int, int, boolean, boolean)
Call path from entry point to com.sun.jndi.dns.DnsClient.query(DnsName, int, int, boolean, boolean): 
    at com.sun.jndi.dns.DnsClient.query(DnsClient.java:178)
    at com.sun.jndi.dns.Resolver.query(Resolver.java:81)
    at com.sun.jndi.dns.DnsContext.c_getAttributes(DnsContext.java:434)
    at com.sun.jndi.toolkit.ctx.ComponentDirContext.p_getAttributes(ComponentDirContext.java:235)
    at com.sun.jndi.toolkit.ctx.PartialCompositeDirContext.getAttributes(PartialCompositeDirContext.java:141)
    at com.sun.jndi.toolkit.ctx.PartialCompositeDirContext.getAttributes(PartialCompositeDirContext.java:129)
    at javax.naming.directory.InitialDirContext.getAttributes(InitialDirContext.java:142)
    at io.micronaut.discovery.client.DnsResolver.getCNamesFromTxtRecord(DnsResolver.java:59)
    at io.micronaut.discovery.client.EndpointUtil.getEC2DiscoveryUrlsFromZone(EndpointUtil.java:197)
    at io.micronaut.discovery.client.EndpointUtil.getServiceUrlsFromDNS(EndpointUtil.java:141)

有人知道问题出在哪里吗？

Answer 1

经过几个问题和帖子，我最终找到了答案。

若要删除此失败，只需在dockerfile中创建本机映像时，将此类com.sun.jndi.dns.dnsclient添加到选项--delay-class-initialization-to-runtime下的类列表中：

Dockerfile

RUN native-image --no-server \
                 ...
                 --delay-class-initialization-to-runtime=...,com.sun.jndi.dns.DnsClient \
                 -H:-UseServiceLoaderFeature \
                 --allow-incomplete-classpath \
                 -H:Name=model-quotes \
                 -H:Class=model.quotes.Application
...