Is there a metric or tool to monitor the Blob Server Connections? Keep seeing below error

java.io.IOException: Unknown operation 71
	at org.apache.flink.runtime.blob.BlobServerConnection.run(BlobServerConnection.java:116) [flink-dist-1.15.3.jar:1.15.3]
2023-01-19 16:43:37,448 ERROR org.apache.flink.runtime.blob.BlobServerConnection           [] - Error while executing BLOB connection.