High CPU in Channels.writeBlocking in JBoss EAP 7.0

Solution Verified - Updated

Environment

  • Red Hat JBoss Enterprise Application Platform (EAP)
    • 7.0.x

Issue

We see high CPU usage in calls like the following:

    	at org.xnio.channels.Channels.writeBlocking(Channels.java:97)
    	at io.undertow.websockets.jsr.WebSocketSessionRemoteEndpoint$BasicWebSocketSessionRemoteEndpoint.sendText(WebSocketSessionRemoteEndpoint.java:283)
    	at org.springframework.web.socket.adapter.standard.StandardWebSocketSession.sendTextMessage(StandardWebSocketSession.java:197)
    	at org.springframework.web.socket.adapter.AbstractWebSocketSession.sendMessage(AbstractWebSocketSession.java:104)

Example of high CPU usage:

PID	CPU	Mem	user
28609	97.8%	12.7%	jboss

Resolution

There is a list of known and solved issues, so the resolution is to upgrade to JBoss EAP 7.1.0 or later version.

Root Cause

SBR
Product(s)
Components
Category
Tags

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