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Logs for One or More Managed Servers of a WebLogic Cluster are Logging Unusually High Number of WARNING|Socket|[BEA-000449] Messages (Doc ID 2976373.1)

Last updated on FEBRUARY 21, 2024

Applies to:

Oracle WebLogic Server - Version 12.2.1.3.0 and later
Information in this document applies to any platform.

Symptoms

Some web clients attempting to access resources on a web application deployed on WebLogic Server (WLS) receive empty responses or blank webpages. 
For example, a curl command executing a request from a client to a server would show a client receiving an empty reply from the server.

This sequence of events occurs across a significantly large number of client requests and taken together causes a degraded user-experience for clients in the form of empty responses and blank webpages.  For example for illustration purposes, a log from one of three Managed Servers in a WLS Cluster might report 34,000+ instances of the above WARNING|Socket|[BEA-000449] message over a 15-hour period.  Environmental differences (e.g. request load, number of WLS Managed Servers per Cluster, and the configuration with which requests are distributed from a Proxy Server or Load Balancer to the WLS backend) may influence the number of reported instances.  Nevertheless, the symptom that is of significance is that over a period of time an unusually higher number of WARNING|Socket|[BEA-000449] messages are observed in the Managed Server logs than is typically expected.

Eventually, after many occurrences of the warnings, one or more of the Managed Servers in the cluster becomes unavailable and needs to be restarted. 

A shutdown and restart of the impacted Managed Servers halts the socket timeout warnings and resumes normal services for end-users, temporarily fixing the issue.  However, after a while, end-users receive empty responses and blank webpages anew, socket timeout warnings resume, and eventually one or more Managed Servers becomes unavailable again.

Changes

 

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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