FAQ-实时同步源端mongodb启动报错unsupported metadata: null

问题描述/异常栈

The program finished with the following exception:
org.apache.flink.client.program.ProgramInvocationException: The main method caused an error: java.lang.NullPointerException: unsupported metadata: null
    at org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:372)
    at org.apache.flink.client.program.PackagedProgram.invokeInteractiveModeForExecution(PackagedProgram.java:222)
    at org.apache.flink.client.ClientUtils.executeProgram(ClientUtils.java:114)
    at org.apache.flink.client.cli.CliFrontend.executeProgram(CliFrontend.java:812)
    at org.apache.flink.client.cli.CliFrontend.run(CliFrontend.java:246)
    at org.apache.flink.client.cli.CliFrontend.parseAndRun(CliFrontend.java:1054)
    at org.apache.flink.client.cli.CliFrontend.lambda$main$10(CliFrontend.java:1132)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:422)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1893)
    at org.apache.flink.runtime.security.contexts.HadoopSecurityContext.runSecured(HadoopSecurityContext.java:41)
    at org.apache.flink.client.cli.CliFrontend.main(CliFrontend.java:1132)
Caused by: java.lang.RuntimeException: java.lang.NullPointerException: unsupported metadata: null
    at com.netease.sloth.core.util.RetryUtil$Retry.doRetry(RetryUtil.java:76)
    at com.netease.sloth.core.util.RetryUtil.doRetry(RetryUtil.java:41)
    at com.netease.sloth.core.executor.NewJobExecutor.handleArgs(NewJobExecutor.java:64)
    at com.netease.sloth.core.executor.NewJobExecutor.(NewJobExecutor.java:44)
    at com.netease.sloth.core.executor.NewJobExecutor.(NewJobExecutor.java:38)
    at com.netease.sloth.core.IngestionEntryPoint.main(IngestionEntryPoint.java:23)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.apache.flink.client.program.PackagedProgram

问题原因

自定义字段有问题， flink mongodb没有${op}函数

作者：魏璐璐