【Flink实战系列】Flink 任务发生 failover 的常见原因

在生产环境中,经常会遇到 Flink 任务发生 failover ,发生 failover 的原因有很多，今天就来总结一下常见的几种情况

2022-02-09 10:22:18​
org.apache.flink.runtime.jobmanager.scheduler.NoResourceAvailableException: Could not allocate all requires slots within timeout of 300000 ms. Slots required: 14000, slots allocated: 13965​
    at org.apache.flink.runtime.executiongraph.SchedulingUtils.lambda$scheduleEager$3(SchedulingUtils.java:245)​
    at java.util.concurrent.CompletableFuture.uniExceptionally(CompletableFuture.java:870)​
    at java.util.concurrent.CompletableFuture$UniExceptionally.tryFire(CompletableFuture.java:852)​
    at java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:474)​
    at java.util.concurrent.CompletableFuture.completeExceptionally(CompletableFuture.java:1977)​
    at org.apache.flink.runtime.concurrent.FutureUtils$ResultConjunctFuture.handleCompletedFuture(FutureUtils.java:633)​
    at org.apache.flink.