public long getExceptionsClearTime() {
    return exceptionsClearTime.get();
  }
Stores the newest exceptions encountered group by dataNodes.

<p>The exceptions are all instances of:

<p>1. {@link PipeRuntimeCriticalException}, to record the failure of pushing {@link PipeMeta},
and will result in the halt of pipe execution.

<p>2. {@link PipeRuntimeConnectorCriticalException}, to record the exception reported by other
pipes sharing the same connector, and will stop the pipe likewise.
iotdb-core/node-commons/src/main/java/org/apache/iotdb/commons/pipe/agent/task/meta/PipeRuntimeMeta.java