InputStream 关​​闭通过 OpenJ9_11.0.8.10 debian x64 的 fatjar/überjar

如何解决InputStream 关​​闭通过 OpenJ9_11.0.8.10 debian x64 的 fatjar/überjar

我在我的环境中遇到了奇怪的行为。

我有一个 spring 应用程序的 fatjar，我在基于 adoptopenjdk/openjdk11-openj9:jdk-11.0.8_10_openj9-0.21.0-debian-slim 的 docker 容器中运行它并使用垃圾收集器 G1GC。

java 选项是：-Xmx128m -XX:+UseG1GC -Xss256K

fatjar 由带有 maven-assembly-plugin 描述符的 jar-with-dependencies 生成。

我的应用程序使用依赖于 aws-java-sdk-core:1.11.955 的 jackson-core:2.6.7。

我的应用程序正常运行，但随机开始抛出 NoClassDefFoundError。阻止这种情况继续发生的唯一方法是重新启动我的容器/应用程序。

当 com.amazonaws.internal.config.InternalConfig.Factory 静态块运行并从类路径 (/com/amazonaws/internal/config/awssdk_config_default.json) 加载 json 资源文件并且它存在时，会发生此错误。

这是堆栈跟踪：

java.lang.NoClassDefFoundError: com.amazonaws.auth.DefaultAWSCredentialsProviderChain (initialization failure)
    at java.base/java.lang.J9VMInternals.initializationAlreadyFailed(J9VMInternals.java:136) 
    ....... (ommited by me,my code calling: new DefaultAWSCredentialsProviderChain())
Caused by: java.lang.IllegalStateException: Fatal: Failed to load the internal config for AWS Java SDK
    at com.amazonaws.internal.config.InternalConfig$Factory.\u003cclinit\u003e(InternalConfig.java:340)
    at com.amazonaws.util.VersionInfoUtils.userAgent(VersionInfoUtils.java:142)
    at com.amazonaws.util.VersionInfoUtils.initializeUserAgent(VersionInfoUtils.java:137)
    at com.amazonaws.util.VersionInfoUtils.getUserAgent(VersionInfoUtils.java:100)
    at com.amazonaws.internal.EC2ResourceFetcher.\u003cclinit\u003e(EC2ResourceFetcher.java:44)
    at com.amazonaws.auth.InstanceMetadataServiceCredentialsFetcher.\u003cinit\u003e(InstanceMetadataServiceCredentialsFetcher.java:36)
    at com.amazonaws.auth.InstanceProfileCredentialsProvider.\u003cinit\u003e(InstanceProfileCredentialsProvider.java:102)
    at com.amazonaws.auth.InstanceProfileCredentialsProvider.\u003cinit\u003e(InstanceProfileCredentialsProvider.java:82)
    at com.amazonaws.auth.InstanceProfileCredentialsProvider.\u003cinit\u003e(InstanceProfileCredentialsProvider.java:66)
    at com.amazonaws.auth.InstanceProfileCredentialsProvider.\u003cclinit\u003e(InstanceProfileCredentialsProvider.java:49)
    at com.amazonaws.auth.EC2ContainerCredentialsProviderWrapper.initializeProvider(EC2ContainerCredentialsProviderWrapper.java:64)
    at com.amazonaws.auth.EC2ContainerCredentialsProviderWrapper.\u003cinit\u003e(EC2ContainerCredentialsProviderWrapper.java:53)
    at com.amazonaws.auth.DefaultAWSCredentialsProviderChain.\u003cinit\u003e(DefaultAWSCredentialsProviderChain.java:49)
    at com.amazonaws.auth.DefaultAWSCredentialsProviderChain.\u003cclinit\u003e(DefaultAWSCredentialsProviderChain.java:43)
    ....... (ommited by me,my code calling: new DefaultAWSCredentialsProviderChain())
Caused by: java.io.IOException: Stream closed
    at java.base/java.util.zip.InflaterInputStream.ensureOpen(InflaterInputStream.java:68)
    at java.base/java.util.zip.InflaterInputStream.read(InflaterInputStream.java:143)
    at java.base/java.io.FilterInputStream.read(FilterInputStream.java:133)
    at com.fasterxml.jackson.core.json.ByteSourceJsonBootstrapper.ensureLoaded(ByteSourceJsonBootstrapper.java:489)
    at com.fasterxml.jackson.core.json.ByteSourceJsonBootstrapper.detectEncoding(ByteSourceJsonBootstrapper.java:126)
    at com.fasterxml.jackson.core.json.ByteSourceJsonBootstrapper.constructParser(ByteSourceJsonBootstrapper.java:215)
    at com.fasterxml.jackson.core.JsonFactory._createParser(JsonFactory.java:1240)
    at com.fasterxml.jackson.core.JsonFactory.createParser(JsonFactory.java:780)
    at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:2679)
    at com.amazonaws.internal.config.InternalConfig.loadfrom(InternalConfig.java:250)
    at com.amazonaws.internal.config.InternalConfig.load(InternalConfig.java:263)
    at com.amazonaws.internal.config.InternalConfig$Factory.\u003cclinit\u003e(InternalConfig.java:336)

调试JsonFactory和ByteSourceJsonBootstrapper后，没有代码调用“InputStream.close()”。

所以我开始认为这可能是 JVM (OpenJ9) 错误...或者垃圾收集器 (G1GC) 的一些奇怪行为。

另一个奇怪的想法是，当我在本地环境中运行同一个 jar 时，我无法得到这个 FilterInputStream 实例和 InflaterInputStream，我只得到一个 sun.net.www.protocol.jar.JarURLConnection$JarURLInputStream。

Ps.：没有 ClassLoader 检测/操作。

有人能给我一盏灯吗？

解决方法

您可以尝试在命令行中添加以下选项以查看流被关闭的原因：

"-Xtrace:print=mt,trigger=method{java/util/zip/InflaterInputStream.close,jstacktrace}"