我正在尝试在我实现了一个可行的可行套接字源的作业上使用保存点。来源看起来类似于此
@Override
public void run(SourceContext<String> sourceContext) throws Exception {
int idx = getRuntimeContext().getIndexOfThisSubtask();
String[] hosts = (config.hostsStr).split(":");
String[] portStrArr = (config.portsStr).split(":");
int[] ports = new int[portStrArr.length];
for (int i = 0; i < portStrArr.length; i++) {
ports[i] = Integer.parseInt(portStrArr[i]);
}
Socket s = new Socket(hosts[idx], ports[idx]);
BufferedReader in = new BufferedReader(new InputStreamReader(s.getInputStream()));
//ois = new ObjectInputStream(s.getInputStream());
while (running) {
String str = in.readLine();
sourceContext.collect(str);
}
sourceContext.close();
}
@Override
public void cancel() {
running = false;
}
群集上的例外看起来像
flink-1.1.3/bin//flink cancel -s hdfs://flink-master:19000/flink-checkpoints a18499a80099045eb5120ecacdabd421
Retrieving JobManager.
Using address flink-master/10.0.0.16:6123 to connect to JobManager.
Cancelling job a18499a80099045eb5120ecacdabd421 with savepoint to hdfs://flink-master:19000/flink-checkpoints.
java.lang.Exception: Canceling the job with ID a18499a80099045eb5120ecacdabd421 failed.
at org.apache.flink.client.CliFrontend.cancel(CliFrontend.java:637)
at org.apache.flink.client.CliFrontend.parseParameters(CliFrontend.java:1092)
at org.apache.flink.client.CliFrontend$2.call(CliFrontend.java:1133)
at org.apache.flink.client.CliFrontend$2.call(CliFrontend.java:1130)
at org.apache.flink.runtime.security.HadoopSecurityContext$1.run(HadoopSecurityContext.java:43)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657)
at org.apache.flink.runtime.security.HadoopSecurityContext.runSecured(HadoopSecurityContext.java:40)
at org.apache.flink.client.CliFrontend.main(CliFrontend.java:1130)
Caused by: java.lang.Exception: Failed to trigger savepoint.
at org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1$$anon$6.apply(JobManager.scala:639)
at org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1$$anon$6.apply(JobManager.scala:629)
at org.apache.flink.runtime.concurrent.impl.FlinkFuture$5.onComplete(FlinkFuture.java:272)
at akka.dispatch.OnComplete.internal(Future.scala:247)
at akka.dispatch.OnComplete.internal(Future.scala:245)
at akka.dispatch.japi$CallbackBridge.apply(Future.scala:175)
at akka.dispatch.japi$CallbackBridge.apply(Future.scala:172)
at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:32)
at akka.dispatch.BatchingExecutor$AbstractBatch.processBatch(BatchingExecutor.scala:55)
at akka.dispatch.BatchingExecutor$BlockableBatch$$anonfun$run$1.apply$mcV$sp(BatchingExecutor.scala:91)
at akka.dispatch.BatchingExecutor$BlockableBatch$$anonfun$run$1.apply(BatchingExecutor.scala:91)
at akka.dispatch.BatchingExecutor$BlockableBatch$$anonfun$run$1.apply(BatchingExecutor.scala:91)
at scala.concurrent.BlockContext$.withBlockContext(BlockContext.scala:72)
at akka.dispatch.BatchingExecutor$BlockableBatch.run(BatchingExecutor.scala:90)
at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:40)
at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:397)
at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
Caused by: java.io.EOFException: Premature EOF: no length prefix available
at org.apache.hadoop.hdfs.protocolPB.PBHelper.vintPrefixed(PBHelper.java:2282)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.createBlockOutputStream(DFSOutputStream.java:1347)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.nextBlockOutputStream(DFSOutputStream.java:1266)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:449)
Suppressed: java.lang.IllegalArgumentException: Self-suppression not permitted
at java.lang.Throwable.addSuppressed(Throwable.java:1043)
at java.io.FilterOutputStream.close(FilterOutputStream.java:159)
at org.apache.flink.runtime.checkpoint.savepoint.SavepointStore.storeSavepointToHandle(SavepointStore.java:207)
at org.apache.flink.runtime.checkpoint.savepoint.SavepointStore.storeSavepointToHandle(SavepointStore.java:150)
at org.apache.flink.runtime.checkpoint.PendingCheckpoint.finalizeCheckpointExternalized(PendingCheckpoint.java:281)
at org.apache.flink.runtime.checkpoint.CheckpointCoordinator.completePendingCheckpoint(CheckpointCoordinator.java:888)
at org.apache.flink.runtime.checkpoint.CheckpointCoordinator.receiveAcknowledgeMessage(CheckpointCoordinator.java:813)
at org.apache.flink.runtime.jobmanager.JobManager$$anonfun$org$apache$flink$runtime$jobmanager$JobManager$$handleCheckpointMessage$1.apply$mcV$sp(JobManager.scala:1462)
at org.apache.flink.runtime.jobmanager.JobManager$$anonfun$org$apache$flink$runtime$jobmanager$JobManager$$handleCheckpointMessage$1.apply(JobManager.scala:1461)
at org.apache.flink.runtime.jobmanager.JobManager$$anonfun$org$apache$flink$runtime$jobmanager$JobManager$$handleCheckpointMessage$1.apply(JobManager.scala:1461)
at scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24)
at scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24)
at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:40)
at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:397)
at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
[CIRCULAR REFERENCE:java.io.EOFException: Premature EOF: no length prefix available]
在我的本地计算机上，保存点被以下例外拒绝：
Cancelling job 4c99e0220c8c4683d1287269073b5c2c with savepoint to savepoints/.
java.lang.Exception: Canceling the job with ID 4c99e0220c8c4683d1287269073b5c2c failed.
at org.apache.flink.client.CliFrontend.cancel(CliFrontend.java:637)
at org.apache.flink.client.CliFrontend.parseParameters(CliFrontend.java:1092)
at org.apache.flink.client.CliFrontend$2.call(CliFrontend.java:1133)
at org.apache.flink.client.CliFrontend$2.call(CliFrontend.java:1130)
at org.apache.flink.runtime.security.HadoopSecurityContext$1.run(HadoopSecurityContext.java:43)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657)
at org.apache.flink.runtime.security.HadoopSecurityContext.runSecured(HadoopSecurityContext.java:40)
at org.apache.flink.client.CliFrontend.main(CliFrontend.java:1130)
Caused by: java.lang.Exception: Failed to trigger savepoint.
at org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1$$anon$6.apply(JobManager.scala:639)
at org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1$$anon$6.apply(JobManager.scala:629)
at org.apache.flink.runtime.concurrent.impl.FlinkFuture$5.onComplete(FlinkFuture.java:272)
at akka.dispatch.OnComplete.internal(Future.scala:247)
at akka.dispatch.OnComplete.internal(Future.scala:245)
at akka.dispatch.japi$CallbackBridge.apply(Future.scala:175)
at akka.dispatch.japi$CallbackBridge.apply(Future.scala:172)
at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:32)
at akka.dispatch.BatchingExecutor$AbstractBatch.processBatch(BatchingExecutor.scala:55)
at akka.dispatch.BatchingExecutor$BlockableBatch$$anonfun$run$1.apply$mcV$sp(BatchingExecutor.scala:91)
at akka.dispatch.BatchingExecutor$BlockableBatch$$anonfun$run$1.apply(BatchingExecutor.scala:91)
at akka.dispatch.BatchingExecutor$BlockableBatch$$anonfun$run$1.apply(BatchingExecutor.scala:91)
at scala.concurrent.BlockContext$.withBlockContext(BlockContext.scala:72)
at akka.dispatch.BatchingExecutor$BlockableBatch.run(BatchingExecutor.scala:90)
at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:40)
at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:397)
at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
Caused by: java.lang.Exception: Checkpoint was declined (tasks not ready)
at org.apache.flink.runtime.checkpoint.PendingCheckpoint.abortDeclined(PendingCheckpoint.java:510)
at org.apache.flink.runtime.checkpoint.CheckpointCoordinator.receiveDeclineMessage(CheckpointCoordinator.java:735)
at org.apache.flink.runtime.jobmanager.JobManager$$anonfun$org$apache$flink$runtime$jobmanager$JobManager$$handleCheckpointMessage$2.apply$mcV$sp(JobManager.scala:1491)
at org.apache.flink.runtime.jobmanager.JobManager$$anonfun$org$apache$flink$runtime$jobmanager$JobManager$$handleCheckpointMessage$2.apply(JobManager.scala:1490)
at org.apache.flink.runtime.jobmanager.JobManager$$anonfun$org$apache$flink$runtime$jobmanager$JobManager$$handleCheckpointMessage$2.apply(JobManager.scala:1490)
at scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24)
at scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24)
... 6 more
是因为我的源无法正确停止，以免检查点发生？在集群上，它确实说它成功了，并将位置返回到保存点，但是该路径上没有文件。
给定源函数摘录对我来说几乎看起来不错。您应该做的是在检查点锁定下输出元素。否则，当触发检查点同时输出元素时，您可能会遇到问题。SourceContext#getCheckpointLock确保这两个操作不会同时进行。
第一个错误看起来好像在HDFS侧有问题一样。您能检查日志是否包含可疑的东西？也许数据节点超出了磁盘空间。
第二个例外表明在执行检查点时出现了问题。JobManager日志应包含一个日志语句，说明为什么检查点失败了。它应该具有格式：丢弃检查点checkpoint_id，因为task execution_id的检查点下降了：quasence 。