NWUI failed to fetch the latest counts for Dashboard monitoring with monitoring.get.error

Summary: The NetWorker Web User Interface (NWUI) is used to manage the NetWorker Datazone. The NWUI Dashboard tab shows error "Failed to fetch latest counts for Dashboard. monitoring.get.error" and does not display the details (Success, Failed, Running, Pending) of the Policies, Workflows, and Actions. ...

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Symptoms

The NWUI console shows:

Failed to fetch latest counts for Dashboard
monitoring.get.error

NWUI Console

Linux: The /nsr/authc/logs/nwui.log shows:
Windows: The C:\Program Files\EMC NetWorker\nsr\authc-server\tomcat\logs\nwui.log shows:

HH:MM:SS [https-jsse-nio-9090-exec-7] ERROR c.e.n.c.n.i.MonitoringApi - Error in fetching count of activities based on status from Monitoring Service. java.net.ConnectException: Connection refused: connect
HH:MM:SS [https-jsse-nio-9090-exec-3] ERROR c.e.n.c.n.i.MonitoringApi - Error in fetching count of activities based on status from Monitoring Service.

Linux: The /nsr/nwui/monitoring/app/logs/monitoring-app.log shows:
Windows: The C:\Program Files\EMC NetWorker\nwui\monitoring\app\logs\monitoring-app.log shows:

YYYY-MM-DD HH:MM:SS [StartupInfoLogger] [main] INFO  com.dell.emc.nw.monitoring.NwMonitoringApplication - Started NwMonitoringApplication in 22.145 seconds (JVM running for 25.477)
YYYY-MM-DD HH:MM:SS [DirectJDKLog] [https-jsse-nio-9095-exec-6] INFO  org.apache.coyote.http11.Http11Processor - Error parsing HTTP request header
 Note: further occurrences of HTTP request parsing errors will be logged at DEBUG level.
java.lang.IllegalArgumentException: Request header is too large
	at org.apache.coyote.http11.Http11InputBuffer.parseHeaders(Http11InputBuffer.java:614) ~[tomcat-embed-core-9.0.48.jar!/:?]
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:292) [tomcat-embed-core-9.0.48.jar!/:?]
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) [tomcat-embed-core-9.0.48.jar!/:?]
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:893) [tomcat-embed-core-9.0.48.jar!/:?]
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1723) [tomcat-embed-core-9.0.48.jar!/:?]
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.48.jar!/:?]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_321]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_321]
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.48.jar!/:?]
	at java.lang.Thread.run(Thread.java:750) [?:1.8.0_321]

Cause

The default monitoring-app.properties setting for the HTTP header size is 8 KB. The default HTTP header may not be sufficient to accommodate all headers with a large Active Directory user or group settings.

Resolution

Increase the monitoring-app.properties HTTP header size setting on the NetWorker Server.

  • Stop the "NetWorker Management Web UI Server" service:
Linux: 
sudo systemctl stop nwui
Windows: 
net stop nwui
  • Open the monitoring-app.properties file in a text editor:
Linux:  
sudo vi /nsr/nwui/monitoring/app/conf/monitoring-app.properties
Windows: 
notepad C:\Program Files\EMC NetWorker\nwui\monitoring\app\conf\monitoring-app.properties
  • Add a new line for the server.max-http-header-size option with value of 32 KB
server.max-http-header-size=32KB
  • Save the changes to the monitoring-app.properties file.
  • Start the "NetWorker Management Web UI Server" service:
Linux: 
sudo systemctl start nwui
Windows: 
net start nwui
Article Properties
Article Number: 000201656
Article Type: Solution
Last Modified: 18 Nov 2025
Version:  2
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