Kafka Streams openjdk:8-alpine 的替代方案

Alternative to openjdk:8-alpine for Kafka Streams

我正在使用 openjdk:8-alpine 部署 Kafka Streams 应用程序。我正在使用 Windowing,它因以下错误而崩溃:

Exception in thread "app-4a382bdc55ae-StreamThread-1" java.lang.UnsatisfiedLinkError: /tmp/librocksdbjni94709417646402513.so: Error loading shared library ld-linux-x86-64.so.2: No such file or directory (needed by /tmp/librocksdbjni94709417646402513.so)
    at java.lang.ClassLoader$NativeLibrary.load(Native Method)
    at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1941)
    at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1824)
    at java.lang.Runtime.load0(Runtime.java:809)
    at java.lang.System.load(System.java:1086)
    at org.rocksdb.NativeLibraryLoader.loadLibraryFromJar(NativeLibraryLoader.java:78)
    at org.rocksdb.NativeLibraryLoader.loadLibrary(NativeLibraryLoader.java:56)
    at org.rocksdb.RocksDB.loadLibrary(RocksDB.java:64)
    at org.rocksdb.RocksDB.<clinit>(RocksDB.java:35)
    at org.rocksdb.Options.<clinit>(Options.java:22)
    at org.apache.kafka.streams.state.internals.RocksDBStore.openDB(RocksDBStore.java:116)
    at org.apache.kafka.streams.state.internals.Segment.openDB(Segment.java:43)
    at org.apache.kafka.streams.state.internals.Segments.getOrCreateSegment(Segments.java:91)
    at org.apache.kafka.streams.state.internals.RocksDBSegmentedBytesStore.put(RocksDBSegmentedBytesStore.java:100)
    at org.apache.kafka.streams.state.internals.RocksDBSessionStore.put(RocksDBSessionStore.java:122)
    at org.apache.kafka.streams.state.internals.ChangeLoggingSessionBytesStore.put(ChangeLoggingSessionBytesStore.java:78)
    at org.apache.kafka.streams.state.internals.ChangeLoggingSessionBytesStore.put(ChangeLoggingSessionBytesStore.java:33)
    at org.apache.kafka.streams.state.internals.CachingSessionStore.putAndMaybeForward(CachingSessionStore.java:177)
    at org.apache.kafka.streams.state.internals.CachingSessionStore.access[=11=]0(CachingSessionStore.java:38)
    at org.apache.kafka.streams.state.internals.CachingSessionStore.apply(CachingSessionStore.java:88)
    at org.apache.kafka.streams.state.internals.NamedCache.flush(NamedCache.java:142)
    at org.apache.kafka.streams.state.internals.NamedCache.flush(NamedCache.java:100)
    at org.apache.kafka.streams.state.internals.ThreadCache.flush(ThreadCache.java:127)
    at org.apache.kafka.streams.state.internals.CachingSessionStore.flush(CachingSessionStore.java:193)
    at org.apache.kafka.streams.state.internals.MeteredSessionStore.flush(MeteredSessionStore.java:169)
    at org.apache.kafka.streams.processor.internals.ProcessorStateManager.flush(ProcessorStateManager.java:244)
    at org.apache.kafka.streams.processor.internals.AbstractTask.flushState(AbstractTask.java:195)
    at org.apache.kafka.streams.processor.internals.StreamTask.flushState(StreamTask.java:332)
    at org.apache.kafka.streams.processor.internals.StreamTask.run(StreamTask.java:312)
    at org.apache.kafka.streams.processor.internals.StreamsMetricsImpl.measureLatencyNs(StreamsMetricsImpl.java:208)
    at org.apache.kafka.streams.processor.internals.StreamTask.commit(StreamTask.java:307)
    at org.apache.kafka.streams.processor.internals.StreamTask.commit(StreamTask.java:297)
    at org.apache.kafka.streams.processor.internals.AssignedTasks.apply(AssignedTasks.java:67)
    at org.apache.kafka.streams.processor.internals.AssignedTasks.applyToRunningTasks(AssignedTasks.java:357)
    at org.apache.kafka.streams.processor.internals.AssignedTasks.commit(AssignedTasks.java:347)
    at org.apache.kafka.streams.processor.internals.TaskManager.commitAll(TaskManager.java:403)
    at org.apache.kafka.streams.processor.internals.StreamThread.maybeCommit(StreamThread.java:994)
    at org.apache.kafka.streams.processor.internals.StreamThread.runOnce(StreamThread.java:811)
    at org.apache.kafka.streams.processor.internals.StreamThread.runLoop(StreamThread.java:750)
    at org.apache.kafka.streams.processor.internals.StreamThread.run(StreamThread.java:720)

搜索上述问题,我遇到了 https://issues.apache.org/jira/browse/KAFKA-4988。但这并没有帮助。

因此,Alpine 使用 musl-libc,但 RocksDB 不支持它。 向 RocksDB 添加对 musl-libc 的支持的问题:facebook/rocksdb#3143.

问题:是否有任何 openjdk docker 图像可以用来制作我的 Kafka Stream 应用程序 运行 并且不会给 rocksdb 带来问题?

Edit-1:我尝试了 RUN apk add --no-cache bash libc6-compat,但它也失败并出现以下错误:

# A fatal error has been detected by the Java Runtime Environment:
#
#  SIGSEGV (0xb) at pc=0x000000000011e336, pid=1, tid=0x00007fc6a3cc8ae8
#
# JRE version: OpenJDK Runtime Environment (8.0_181-b13) (build 1.8.0_181-b13)
# Java VM: OpenJDK 64-Bit Server VM (25.181-b13 mixed mode linux-amd64 compressed oops)
# Derivative: IcedTea 3.9.0
# Distribution: Custom build (Tue Oct 23 11:27:22 UTC 2018)
# Problematic frame:
# C  0x000000000011e336
#
# Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again

您链接的票证 https://issues.apache.org/jira/browse/KAFKA-4988 提供了很多关于问题的见解。

如前所述,RocksDB 似乎与 musl libc 不兼容,因此需要 glibc。

安装 libc6-compact 可能不起作用:它在 musl libc 上提供了一个兼容层,它模仿 glibc 库结构并实现了一些缺失的功能,但这与安装 glibc 本身不同。 glibc 是一个复杂的实现,因此兼容性库和实际的 glibc 之间可能没有一对一的关联。请参阅 here 了解一些细微的 musl/glibc 差异。

看了工单评论,可能是有问题的库librocksdbjni.so,依赖于libstdc++6.

因此,我会尝试以下操作(使用 openjdk:8-alpine 作为基础图像):

对我有用的解决方案是将 docker 图像从 openjdk:8-alpine 更改为 adoptopenjdk/openjdk8:alpine-slim

adoptopenjdk/openjdk8:alpine-slim glibc 兼容。

我是从 http://blog.gilliard.lol/2018/11/05/alpine-jdk11-images.html 那里知道这张图片的。

希望对大家有所帮助。

与其更改默认 docker 基础映像,不如为 Alpine 发行版构建 glibc。更好的是,您可以从 Sasha Gerrand's github page 获取预构建的 apk。这是我们添加到 Dockerfile 中的内容,以使其与他的预构建 apk 一起工作:

# # GLIBC - Kafka Dependency (RocksDB)
# Used by Kafka for default State Stores.
# glibc's apk was built for Alpine Linux and added to our repository
# from this source: https://github.com/sgerrand/alpine-pkg-glibc/
ARG GLIBC_APK=glibc-2.30-r0.apk
COPY ${KAFKA_DIR}/${GLIBC_APK} opt/
RUN apk add --no-cache --allow-untrusted opt/${GLIBC_APK}

# C++ Std Lib - Kafka Dependency (RocksDB)
RUN apk add --no-cache libstdc++

关于 https://issues.apache.org/jira/browse/KAFKA-4988 中的 Kafka Streams 和 Alpine linux 不兼容的已知问题。 对于那些使用 Java 11 的人,adoptopenjdk/openjdk11:alpine-slim 对我来说很好用。 另一种解决方案是仍然使用 openjdk:11-jdk-alpine 图像作为基础图像,然后手动安装 snappy-java lib

FROM openjdk:11-jdk-alpine
RUN apk update && apk add --no-cache gcompat
...