背景：
bin/flink savepoint 162f59ee8c59f1617a1cf638e3640858 --target kubernetes-application -Dkubernetes.cluster-id=test -Dkubernetes.namespace=bigdata
k8s上提交savepoint 执行命令，任务报错
org.apache.flink.util.FlinkException: Triggering a savepoint for the job 162f59ee8c59f1617a1cf638e3640858 failed.
at org.apache.flink.client.cli.CliFrontend.triggerSavepoint(CliFrontend.java:777)
at org.apache.flink.client.cli.CliFrontend.lambda$savepoint$9(CliFrontend.java:754)
at org.apache.flink.client.cli.CliFrontend.runClusterAction(CliFrontend.java:1002)
at org.apache.flink.client.cli.CliFrontend.savepoint(CliFrontend.java:751)
at org.apache.flink.client.cli.CliFrontend.parseAndRun(CliFrontend.java:1072)
at org.apache.flink.client.cli.CliFrontend.lambda$main$10(CliFrontend.java:1132)
at org.apache.flink.runtime.security.contexts.NoOpSecurityContext.runSecured(NoOpSecurityContext.java:28)
at org.apache.flink.client.cli.CliFrontend.main(CliFrontend.java:1132)
Caused by: java.util.concurrent.TimeoutException
at java.util.concurrent.CompletableFuture.timedGet(CompletableFuture.java:1771)
at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1915)
at org.apache.flink.client.cli.CliFrontend.triggerSavepoint(CliFrontend.java:771)
... 7 more
解决办法：
提交任务时增加如下配置，或修改flink-conf.yaml文件
akka.client.timeout: 300000
