遷移 Flink 1.4.1 到 1.13.2
[英]Migration Flink 1.4.1 to 1.13.2
問題描述
我們在我們的項目之一中使用Flink 1.4.1 。 我們通過 Flink 將一些圖像處理作業發送到我們的處理節點。 Flink 任務管理器安裝在每個處理節點上。 我們的主應用程序將作業發送給 Flink Job Manager，Flink Job Manager 根據可用性將作業發送給 Flink Task Manager。 我們實現了一個 java 應用程序（假設是節點應用程序），Flink 在節點上執行這個應用程序。 這個應用程序執行我們在處理節點上運行的處理器。 這工作正常，但在我們將 Flink 從版本 1.4.1 遷移到 1.13.2 后，我們收到以下錯誤。
2021-09-30 14:45:56,107 INFO org.apache.flink.runtime.jobmaster.JobMaster [] - JobManager successfully registered at ResourceManager, leader id: 00000000000000000000000000000000.
2021-09-30 14:45:56,108 INFO org.apache.flink.runtime.resourcemanager.slotmanager.DeclarativeSlotManager [] - Received resource requirements from job 9603bc4718c13ab4015372e89f89dd60: [ResourceRequirement{resourceProfile=ResourceProfile{UNKNOWN}, numberOfRequiredSlots=1}]
2021-09-30 14:45:56,132 ERROR tr.com.sdt.mm.wfm.processor.api.agent.ProcessorInvokerAgent [] - An unexpected exception occurred.
org.apache.flink.api.common.InvalidProgramException: Job was submitted in detached mode. Results of job execution, such as accumulators, runtime, etc. are not available. Please make sure your program doesn't call an eager execution function [collect, print, printToErr, count].
at org.apache.flink.core.execution.DetachedJobExecutionResult.getAccumulatorResult(DetachedJobExecutionResult.java:56) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.api.java.DataSet.collect(DataSet.java:419) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.api.java.DataSet.print(DataSet.java:1748) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at tr.com.sdt.mm.wfm.processor.api.agent.ProcessorInvokerAgent.main(ProcessorInvokerAgent.java:149) ~[bdb0ecae-9aa3-4962-a392-4464d0db0ae6_tr.com.sdt.mm.wfm.processor.api-0.0-DEV-SNAPSHOT.jar:0.0-DEV-SNAPSHOT]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_301]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_301]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_301]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_301]
at org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:355) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.client.program.PackagedProgram.invokeInteractiveModeForExecution(PackagedProgram.java:222) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.client.ClientUtils.executeProgram(ClientUtils.java:114) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.client.deployment.application.DetachedApplicationRunner.tryExecuteJobs(DetachedApplicationRunner.java:84) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.client.deployment.application.DetachedApplicationRunner.run(DetachedApplicationRunner.java:70) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.runtime.webmonitor.handlers.JarRunHandler.lambda$handleRequest$0(JarRunHandler.java:102) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1604) [?:1.8.0_301]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_301]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_301]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) [?:1.8.0_301]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) [?:1.8.0_301]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_301]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_301]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_301]
2021-09-30 14:45:56,133 WARN org.apache.flink.client.deployment.application.DetachedApplicationRunner [] - Could not execute application:
org.apache.flink.client.program.ProgramInvocationException: The main method caused an error: Job was submitted in detached mode. Results of job execution, such as accumulators, runtime, etc. are not available. Please make sure your program doesn't call an eager execution function [collect, print, printToErr, count].
at org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:372) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.client.program.PackagedProgram.invokeInteractiveModeForExecution(PackagedProgram.java:222) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.client.ClientUtils.executeProgram(ClientUtils.java:114) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.client.deployment.application.DetachedApplicationRunner.tryExecuteJobs(DetachedApplicationRunner.java:84) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.client.deployment.application.DetachedApplicationRunner.run(DetachedApplicationRunner.java:70) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.runtime.webmonitor.handlers.JarRunHandler.lambda$handleRequest$0(JarRunHandler.java:102) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1604) [?:1.8.0_301]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_301]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_301]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) [?:1.8.0_301]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) [?:1.8.0_301]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_301]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_301]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_301]
Caused by: org.apache.flink.api.common.InvalidProgramException: Job was submitted in detached mode. Results of job execution, such as accumulators, runtime, etc. are not available. Please make sure your program doesn't call an eager execution function [collect, print, printToErr, count].
at org.apache.flink.core.execution.DetachedJobExecutionResult.getAccumulatorResult(DetachedJobExecutionResult.java:56) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.api.java.DataSet.collect(DataSet.java:419) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.api.java.DataSet.print(DataSet.java:1748) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at tr.com.sdt.mm.wfm.processor.api.agent.ProcessorInvokerAgent.main(ProcessorInvokerAgent.java:149) ~[?:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_301]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_301]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_301]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_301]
at org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:355) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
... 13 more
2021-09-30 14:45:56,136 ERROR org.apache.flink.runtime.webmonitor.handlers.JarRunHandler [] - Exception occurred in REST handler: Could not execute application.
2021-09-30 14:45:56,148 WARN org.apache.flink.runtime.webmonitor.handlers.JarRunHandler [] - **Configuring the job submission via query parameters is deprecated. Please migrate to submitting a JSON request instead.**
2021-09-30 14:45:56,148 WARN org.apache.flink.runtime.webmonitor.handlers.JarRunHandler [] - **Configuring the job submission via query parameters is deprecated. Please migrate to submitting a JSON request instead.**
我們的 Flink 作業如下所示。
public class ProcessorInvokerAgent implements MapFunction<String[], IProcessingNodeResult> {
.....
.......
........
public static void main(String[] args) throws Exception {
ExecutionEnvironment environment = ExecutionEnvironment.getExecutionEnvironment();
String[][] dataTaken = { args };
DataSet<String[]> elements = environment.fromElements(dataTaken);
MapOperator<String[], IProcessingNodeResult> map = elements.map(new ProcessorInvokerAgent());
try {
map.print();
environment.execute();
} catch (Exception exc) {
LOGGER.error("An unexpected exception occurred.", exc);
throw exc;
}
}
/**
* Invokes the processor controllers with specified arguments.
*
* @param args
* the arguments of processing request (first one is base64 encoded
* order, and second one is base64 encoded configuration)
* @return the processing node result
* @throws ProcessorAgentException
* if cannot write processor result to
*/
public IProcessingNodeResult map(String[] args) throws ProcessorAgentException {
IProcessingNodeResult result = null;
// check if argument number is valid
if (args.length == 0) {
// cannot send result to manager raise exception
throw new ProcessorAgentException("Invalid number of arguments(" + args.length
+ "), must match format <command> (any-other-param)* . Agent could not be invoked", null);
} else if ("execute".equalsIgnoreCase(args[0])) {
if (args.length != 3) {
// cannot send result to manager raise exception
throw new ProcessorAgentException("Invalid number of arguments (" + args.length
+ ") for 'execute' command. Must match 'execute' <processing-order-id> <path-to-request-file>",
null);
} else {
result = handleProcessorExecution(args);
}
} else {
// cannot send result to manager raise exception
throw new ProcessorAgentException(
"Invalid execution command (" + args[0] + ")is given to processor agent. Agent will not be invoked",
null);
}
return result;
}
private IProcessingNodeResult handleProcessorExecution(String[] args) {
// args[0] was command thus we need to start from index 1
try {
// 1st position contains processing order id (same as order#getOrderIdentifier())
String processingOrderId = getArg1_ProcessingOrderId(args);
LOGGER.info("Processor Invoker agent is started proceeding on order {}", processingOrderId);
// 2nd position contains handle for processing order request file (this file contains all the related parameters for processing order)
ResourceAccessInfo processingOrderFile = getArg2_ProcessingOrderFile(args, processingOrderId);
LOGGER.debug("Argumans are extracted and checked. Processing order file will be downloaded and will be parsed.");
List<String> lines = downloadOrderFileAndGetLines(processingOrderFile, processingOrderId);
LOGGER.debug("Processing order file lines are : \n{}", printLines(lines));
IProcessingOrder order = getLine1_ProcessingOrder(lines); // order is initialized in this function
if (order != null) { // if order read and successfully parsed
LogUtils.putMDC(ECommonSystemProperty.MMUGS_ENTITY.getValue(), order.getInstanceId(), order.getParentProcessId());
LOGGER.debug("Line 1: Procesing Order has extracted successfully. Order Id=\"{}\"", order.getOrderIdentifier());
IConfiguration configuration = getLine2_ConfigurationYAML(lines); // configuration is initialized in this function
LOGGER.debug("Line 2: Configuration YAML has extracted.Order Id=\"{}\"", order.getOrderIdentifier());
String procConfDir = getProcessorParametersConfDir(configuration);
LOGGER.debug("Processing Node's processor parameters conf directory =\"{}\" for Order Id=\"{}\"", procConfDir, order.getOrderIdentifier());
// The errors occurred while extracting Line 3&4 are logged as error/info.
getLine3And4_ProcessorParamConfAndScripts(lines, processingOrderId, procConfDir);
// The errors occurred while extracting Line 5 are logged as error/info.
getLine5_AdditionalQueryConf(lines, processingOrderId, procConfDir);
// The errors occurred while extracting Line 6 are logged as error/info.
ProcTableType wsConfFileContent = getLine6_IPFWSConf(lines, processingOrderId);
// The errors occurred while extracting Line 7 are logged as error/info.
getLine7_TaskTable(lines, wsConfFileContent, order.getProcessorName(), order.getProcessorVersion(), processingOrderId);
executeProcessor(order, configuration);
}
} catch (ProcessorInvokerAgentException exc) {
LOGGER.debug("Processor execution result message=\"{}\", status=\"{}\"", exc.getResult().getMessage(), exc.getResult().getRequestStatus().value());
return exc.getResult();
} catch (Exception exc) {
LOGGER.error("Processor execution failed due to an exception.Ex:\"{}\"", exc.getMessage(), exc);
}
LOGGER.debug("handleProcessorExecution COMPLETED");
return null;
}
}
我們根據錯誤刪除了 map.print() 行。 但是在更改之后我們收到了以下錯誤。
2021-10-01 10:55:55,767 WARN org.apache.flink.runtime.webmonitor.handlers.JarRunHandler [] - Configuring the job submission via query parameters is deprecated. Please migrate to submitting a JSON request instead.
2021-10-01 10:55:55,769 WARN org.apache.flink.runtime.webmonitor.handlers.JarRunHandler [] - Configuring the job submission via query parameters is deprecated. Please migrate to submitting a JSON request instead.
2021-10-01 10:55:55,992 INFO org.apache.flink.client.ClientUtils [] - Starting program (detached: true)
2021-10-01 10:55:56,091 ERROR tr.com.sdt.mm.wfm.processor.api.agent.ProcessorInvokerAgent [] - An unexpected exception occurred.
java.lang.RuntimeException: No data sinks have been created yet. A program needs at least one sink that consumes data. Examples are writing the data set or printing it.
at org.apache.flink.api.java.ExecutionEnvironment.createProgramPlan(ExecutionEnvironment.java:1170) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.api.java.ExecutionEnvironment.createProgramPlan(ExecutionEnvironment.java:1145) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.api.java.ExecutionEnvironment.executeAsync(ExecutionEnvironment.java:1041) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.client.program.ContextEnvironment.executeAsync(ContextEnvironment.java:129) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.client.program.ContextEnvironment.execute(ContextEnvironment.java:70) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.api.java.ExecutionEnvironment.execute(ExecutionEnvironment.java:942) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at tr.com.sdt.mm.wfm.processor.api.agent.ProcessorInvokerAgent.main(ProcessorInvokerAgent.java:150) ~[0a856782-ce46-4a33-b438-2519a2f92278_tr.com.sdt.mm.wfm.processor.api-0.0-DEV-SNAPSHOT.jar:0.0-DEV-SNAPSHOT]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_301]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_301]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_301]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_301]
at org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:355) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.client.program.PackagedProgram.invokeInteractiveModeForExecution(PackagedProgram.java:222) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.client.ClientUtils.executeProgram(ClientUtils.java:114) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.client.deployment.application.DetachedApplicationRunner.tryExecuteJobs(DetachedApplicationRunner.java:84) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.client.deployment.application.DetachedApplicationRunner.run(DetachedApplicationRunner.java:70) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.runtime.webmonitor.handlers.JarRunHandler.lambda$handleRequest$0(JarRunHandler.java:102) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1604) [?:1.8.0_301]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_301]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_301]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) [?:1.8.0_301]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) [?:1.8.0_301]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_301]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_301]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_301]
2021-10-01 10:55:56,098 WARN org.apache.flink.client.deployment.application.DetachedApplicationRunner [] - Could not execute application:
org.apache.flink.client.program.ProgramInvocationException: The main method caused an error: No data sinks have been created yet. A program needs at least one sink that consumes data. Examples are writing the data set or printing it.
at org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:372) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.client.program.PackagedProgram.invokeInteractiveModeForExecution(PackagedProgram.java:222) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.client.ClientUtils.executeProgram(ClientUtils.java:114) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.client.deployment.application.DetachedApplicationRunner.tryExecuteJobs(DetachedApplicationRunner.java:84) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.client.deployment.application.DetachedApplicationRunner.run(DetachedApplicationRunner.java:70) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.runtime.webmonitor.handlers.JarRunHandler.lambda$handleRequest$0(JarRunHandler.java:102) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1604) [?:1.8.0_301]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_301]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_301]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) [?:1.8.0_301]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) [?:1.8.0_301]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_301]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_301]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_301]
Caused by: java.lang.RuntimeException: No data sinks have been created yet. A program needs at least one sink that consumes data. Examples are writing the data set or printing it.
at org.apache.flink.api.java.ExecutionEnvironment.createProgramPlan(ExecutionEnvironment.java:1170) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.api.java.ExecutionEnvironment.createProgramPlan(ExecutionEnvironment.java:1145) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.api.java.ExecutionEnvironment.executeAsync(ExecutionEnvironment.java:1041) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.client.program.ContextEnvironment.executeAsync(ContextEnvironment.java:129) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.client.program.ContextEnvironment.execute(ContextEnvironment.java:70) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at org.apache.flink.api.java.ExecutionEnvironment.execute(ExecutionEnvironment.java:942) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
at tr.com.sdt.mm.wfm.processor.api.agent.ProcessorInvokerAgent.main(ProcessorInvokerAgent.java:150) ~[?:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_301]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_301]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_301]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_301]
at org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:355) ~[flink-dist_2.11-1.13.2.jar:1.13.2]
... 13 more
2021-10-01 10:55:56,102 ERROR org.apache.flink.runtime.webmonitor.handlers.JarRunHandler [] - Exception occurred in REST handler: Could not execute application.
我們應該做什么？ 如何改變我們的工作？ 有遷移步驟嗎？
謝謝你。
3 個解決方案
解決方案1
0 2021-10-01 08:10:15
我建議查看 Flink 1.5、1.6 等一直到 1.13 的發行說明。 Flink 1.3 於 2017 年發布，此后發生了很多變化。
解決方案2
0 2021-10-01 14:37:53
恢復map.print() ，並刪除environment.execute() 。
解決方案3
0 2021-10-05 04:27:08
最后我通過對我的實現應用以下更改解決了這個問題。
元組用於結果。 Class 定義更新如下：
public class ProcessorInvokerAgent implements MapFunction<String[], Tuple1<IProcessingNodeResult>> {
數據集定義更新如下：
DataSet<Tuple1<IProcessingNodeResult>> results = elements.map(new ProcessorInvokerAgent());
map.print() 替換為以下行：
results.writeAsText(localResultFile.getPath(), org.apache.flink.core.fs.FileSystem.WriteMode.OVERWRITE);
就這樣。
Flink 遷移：BucketingSink[T] 到 StreamingFileSink[T]
[英]Flink migration: BucketingSink[T] to StreamingFileSink[T]
Android Studio 1.4.1'IndexOutOfBoundsException'中的困難運行時錯誤
[英]Difficult runtime errors in Android Studio 1.4.1 'IndexOutOfBoundsException'
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