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  windows下使用idea编写代码使用opencv的库，然后打包工程提交到linux上的flink集群运行。

  在windows下编写的代码，打包提交到linux上运行，遇到了很多opencv使用的坑！！！！现在总结一下：   

报错1：

Caused by: java.lang.UnsatisfiedLinkError: no opencv_java320 in java.library.path        at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1860)        at java.lang.Runtime.loadLibrary0(Runtime.java:871)        at java.lang.System.loadLibrary(System.java:1122)        at com.flinkimage.utils.ImageOP.
   
    (ImageOP.java:18)        at com.flinkimage.opencvFlatMap.flatMap(opencvFlatMap.java:65)        at com.flinkimage.opencvFlatMap.flatMap(opencvFlatMap.java:18)        at org.apache.flink.streaming.api.operators.StreamFlatMap.processElement(StreamFlatMap.java:47)        at org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.pushToOperator(CopyingChainingOutput.java:71)        at org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.collect(CopyingChainingOutput.java:46)        at org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.collect(CopyingChainingOutput.java:26)        at org.apache.flink.streaming.api.operators.CountingOutput.collect(CountingOutput.java:50)        at org.apache.flink.streaming.api.operators.CountingOutput.collect(CountingOutput.java:28)        at org.apache.flink.streaming.api.operators.StreamSourceContexts$ManualWatermarkContext.processAndCollect(StreamSourceContexts.java:317)        at org.apache.flink.streaming.api.operators.StreamSourceContexts$WatermarkContext.collect(StreamSourceContexts.java:411)        at com.flinkimage.InOutFormat.ImageDirSource.run(ImageDirSource.java:69)        at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:110)        at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:66)        at org.apache.flink.streaming.runtime.tasks.SourceStreamTask$LegacySourceFunctionThread.run(SourceStreamTask.java:263)
   

解决办法：

  在代码中使用System.out.println(System.getProperty(“java.library.path”));获取java.library.path。然后把libopencv_java320.so文件放在任意一个目录下！！！！！！！！！（前提是有.so文件）

  我获取的是：/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib，在此把libopencv_java320.so文件放在linux下的/usr/lib路径下。

再次运行就不会报这个错误了。

  

报错2：

Caused by: java.lang.NoClassDefFoundError: org/opencv/core/Core        at com.flinkimage.utils.ImageOP.
   
    (ImageOP.java:18)        at com.flinkimage.opencvFlatMap.flatMap(opencvFlatMap.java:65)        at com.flinkimage.opencvFlatMap.flatMap(opencvFlatMap.java:18)        at org.apache.flink.streaming.api.operators.StreamFlatMap.processElement(StreamFlatMap.java:47)        at org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.pushToOperator(CopyingChainingOutput.java:71)        at org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.collect(CopyingChainingOutput.java:46)        at org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.collect(CopyingChainingOutput.java:26)        at org.apache.flink.streaming.api.operators.CountingOutput.collect(CountingOutput.java:50)        at org.apache.flink.streaming.api.operators.CountingOutput.collect(CountingOutput.java:28)        at org.apache.flink.streaming.api.operators.StreamSourceContexts$ManualWatermarkContext.processAndCollect(StreamSourceContexts.java:317)        at org.apache.flink.streaming.api.operators.StreamSourceContexts$WatermarkContext.collect(StreamSourceContexts.java:411)        at com.flinkimage.InOutFormat.ImageDirSource.run(ImageDirSource.java:69)        at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:110)        at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:66)        at org.apache.flink.streaming.runtime.tasks.SourceStreamTask$LegacySourceFunctionThread.run(SourceStreamTask.java:263)Caused by: java.lang.ClassNotFoundException: org.opencv.core.Core        at java.net.URLClassLoader.findClass(URLClassLoader.java:382)        at java.lang.ClassLoader.loadClass(ClassLoader.java:418)        at org.apache.flink.util.FlinkUserCodeClassLoader.loadClassWithoutExceptionHandling(FlinkUserCodeClassLoader.java:64)        at org.apache.flink.util.ChildFirstClassLoader.loadClassWithoutExceptionHandling(ChildFirstClassLoader.java:74)        at org.apache.flink.util.FlinkUserCodeClassLoader.loadClass(FlinkUserCodeClassLoader.java:48)        at java.lang.ClassLoader.loadClass(ClassLoader.java:351)        ... 15 more
   

  

解决办法：

  说是类没有发现，总的来说就是opencv jar包不存在，我把打包的工程jar包拆开看，里面确实也没有发现opencv相关的jar包。

主要问题还是我以为只要在工程中添加了opencv-320.jar包就可以了，实际上并不行。我的理解是通过添加jar包的方式，maven仓库里面不会有相应的包！

在pom文件中添加：

           
               
    
     org.openpnp
                
    
     opencv
                
    
     3.2.0-1
            
   

  

报错3：

Caused by: org.apache.flink.runtime.JobException: Recovery is suppressed by NoRestartBackoffTimeStrategy        at org.apache.flink.runtime.executiongraph.failover.flip1.ExecutionFailureHandler.handleFailure(ExecutionFailureHandler.java:118)        at org.apache.flink.runtime.executiongraph.failover.flip1.ExecutionFailureHandler.getFailureHandlingResult(ExecutionFailureHandler.java:80)        at org.apache.flink.runtime.scheduler.DefaultScheduler.handleTaskFailure(DefaultScheduler.java:233)        at org.apache.flink.runtime.scheduler.DefaultScheduler.maybeHandleTaskFailure(DefaultScheduler.java:224)        at org.apache.flink.runtime.scheduler.DefaultScheduler.updateTaskExecutionStateInternal(DefaultScheduler.java:215)        at org.apache.flink.runtime.scheduler.SchedulerBase.updateTaskExecutionState(SchedulerBase.java:666)        at org.apache.flink.runtime.scheduler.SchedulerNG.updateTaskExecutionState(SchedulerNG.java:89)        at org.apache.flink.runtime.jobmaster.JobMaster.updateTaskExecutionState(JobMaster.java:449)        at sun.reflect.GeneratedMethodAccessor90.invoke(Unknown Source)        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)        at java.lang.reflect.Method.invoke(Method.java:498)        at org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleRpcInvocation(AkkaRpcActor.java:305)        at org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleRpcMessage(AkkaRpcActor.java:212)        at org.apache.flink.runtime.rpc.akka.FencedAkkaRpcActor.handleRpcMessage(FencedAkkaRpcActor.java:77)        at org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleMessage(AkkaRpcActor.java:158)        at akka.japi.pf.UnitCaseStatement.apply(CaseStatements.scala:26)        at akka.japi.pf.UnitCaseStatement.apply(CaseStatements.scala:21)        at scala.PartialFunction.applyOrElse(PartialFunction.scala:123)        at scala.PartialFunction.applyOrElse$(PartialFunction.scala:122)        at akka.japi.pf.UnitCaseStatement.applyOrElse(CaseStatements.scala:21)        at scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:171)        at scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:172)        at scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:172)        at akka.actor.Actor.aroundReceive(Actor.scala:517)        at akka.actor.Actor.aroundReceive$(Actor.scala:515)        at akka.actor.AbstractActor.aroundReceive(AbstractActor.scala:225)        at akka.actor.ActorCell.receiveMessage(ActorCell.scala:592)        at akka.actor.ActorCell.invoke(ActorCell.scala:561)        at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:258)        at akka.dispatch.Mailbox.run(Mailbox.scala:225)        at akka.dispatch.Mailbox.exec(Mailbox.scala:235)        at akka.dispatch.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)        at akka.dispatch.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)        at akka.dispatch.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)        at akka.dispatch.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)Caused by: java.lang.UnsatisfiedLinkError: org.opencv.core.Mat.n_Mat(III)J        at org.opencv.core.Mat.n_Mat(Native Method)        at org.opencv.core.Mat.
   
    (Mat.java:37)        at com.flinkimage.utils.ImageOP.Buffer2Mat(ImageOP.java:55)        at com.flinkimage.utils.ImageDeal.RGB2Gray(ImageDeal.java:87)        at com.flinkimage.opencvFlatMap.flatMap(opencvFlatMap.java:78)        at com.flinkimage.opencvFlatMap.flatMap(opencvFlatMap.java:18)        at org.apache.flink.streaming.api.operators.StreamFlatMap.processElement(StreamFlatMap.java:47)        at org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.pushToOperator(CopyingChainingOutput.java:71)        at org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.collect(CopyingChainingOutput.java:46)        at org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.collect(CopyingChainingOutput.java:26)        at org.apache.flink.streaming.api.operators.CountingOutput.collect(CountingOutput.java:50)        at org.apache.flink.streaming.api.operators.CountingOutput.collect(CountingOutput.java:28)        at org.apache.flink.streaming.api.operators.StreamSourceContexts$ManualWatermarkContext.processAndCollect(StreamSourceContexts.java:317)        at org.apache.flink.streaming.api.operators.StreamSourceContexts$WatermarkContext.collect(StreamSourceContexts.java:411)        at com.flinkimage.InOutFormat.ImageDirSource.run(ImageDirSource.java:69)        at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:110)        at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:66)        at org.apache.flink.streaming.runtime.tasks.SourceStreamTask$LegacySourceFunctionThread.run(SourceStreamTask.java:263)
   

  

解决办法：

在用到core的地方添加静态代码块：

static {
           System.loadLibrary(Core.NATIVE_LIBRARY_NAME); // 得保证先执行该语句，用于加载库，才能调用其他操作库的语句，    }

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