Google Cloud Bigtable Java客戶端-技術錯誤

Question

我正在嘗試連接到Cloud Bigtable； 但是，我遇到了無法找到netty-tcnative問題。

Maven依賴項：

<dependency>
    <groupId>com.google.cloud.bigtable</groupId>
    <artifactId>bigtable-hbase-1.2</artifactId>
    <version>0.9.2</version>
</dependency>

<dependency>
    <groupId>io.netty</groupId>
    <artifactId>netty-tcnative-boringssl-static</artifactId>
    <version>1.1.33.Fork19</version>
</dependency>

錯誤輸出：

ERROR 2016-09-09 22:26:00,969 [main] com.google.cloud.bigtable.grpc.BigtableSession: Neither Jetty ALPN nor OpenSSL are available. OpenSSL unavailability cause:
java.lang.IllegalArgumentException: Failed to load any of the given libraries: [netty-tcnative-osx-x86_64, netty-tcnative]    
Exception in thread "BigtableSession-startup-2" java.lang.ExceptionInInitializerError
at com.google.cloud.bigtable.grpc.BigtableSession$3.run(BigtableSession.java:194)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.IllegalStateException: zip file closed
at java.util.zip.ZipFile.ensureOpen(ZipFile.java:634)
at java.util.zip.ZipFile.getEntry(ZipFile.java:305)
at java.util.jar.JarFile.getEntry(JarFile.java:227)
at java.util.jar.JarFile.getJarEntry(JarFile.java:210)
at sun.misc.URLClassPath$JarLoader.getResource(URLClassPath.java:840)
at sun.misc.URLClassPath.getResource(URLClassPath.java:199)
at java.net.URLClassLoader$1.run(URLClassLoader.java:358)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at org.mule.module.launcher.FineGrainedControlClassLoader.findClass(FineGrainedControlClassLoader.java:175)
at org.mule.module.launcher.MuleApplicationClassLoader.findClass(MuleApplicationClassLoader.java:134)
at org.mule.module.launcher.FineGrainedControlClassLoader.loadClass(FineGrainedControlClassLoader.java:119)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at com.google.bigtable.repackaged.io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:36)
at com.google.bigtable.repackaged.io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:58)
at com.google.bigtable.repackaged.io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:47)
at com.google.bigtable.repackaged.io.netty.channel.MultithreadEventLoopGroup.<init>(MultithreadEventLoopGroup.java:58)
at com.google.bigtable.repackaged.io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:77)
at com.google.bigtable.repackaged.io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:72)
at com.google.bigtable.repackaged.io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:59)
at com.google.cloud.bigtable.grpc.BigtableSessionSharedThreadPools.init(BigtableSessionSharedThreadPools.java:85)
at com.google.cloud.bigtable.grpc.BigtableSessionSharedThreadPools.<init>(BigtableSessionSharedThreadPools.java:77)
at com.google.cloud.bigtable.grpc.BigtableSessionSharedThreadPools.<clinit>(BigtableSessionSharedThreadPools.java:45)
... 4 more
Exception in thread "BigtableSession-startup-1" java.lang.IllegalStateException: zip file closed
at java.util.zip.ZipFile.ensureOpen(ZipFile.java:634)
at java.util.zip.ZipFile.getEntry(ZipFile.java:305)
at java.util.jar.JarFile.getEntry(JarFile.java:227)
at java.util.jar.JarFile.getJarEntry(JarFile.java:210)
at sun.misc.URLClassPath$JarLoader.getResource(URLClassPath.java:840)
at sun.misc.URLClassPath.getResource(URLClassPath.java:199)
at java.net.URLClassLoader$1.run(URLClassLoader.java:358)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at org.mule.module.launcher.FineGrainedControlClassLoader.findClass(FineGrainedControlClassLoader.java:175)
at org.mule.module.launcher.MuleApplicationClassLoader.findClass(MuleApplicationClassLoader.java:134)
at org.mule.module.launcher.FineGrainedControlClassLoader.loadClass(FineGrainedControlClassLoader.java:119)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at com.google.bigtable.repackaged.com.google.api.client.http.javanet.NetHttpTransport$Builder.trustCertificates(NetHttpTransport.java:270)
at com.google.bigtable.repackaged.com.google.api.client.googleapis.javanet.GoogleNetHttpTransport.newTrustedTransport(GoogleNetHttpTransport.java:55)
at com.google.cloud.bigtable.config.CredentialFactory.getHttpTransport(CredentialFactory.java:94)
at com.google.cloud.bigtable.grpc.BigtableSession$2.run(BigtableSession.java:183)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)

Answer 1

此問題歸因於Mule的類加載器。 Mule在自己的類加載器中運行每個應用程序。 需要將其移至Mule的通用類加載器（java.class.path），而不是應用程序類加載器。 確保BigTable客戶端庫和tcnative都在同一類路徑中。

在其他容器（例如Tomcat）中，由於它們遵循類似的類加載器模式，因此會出現此問題。