PowerFlex 3.6: Gateway Encounters Java Heap Space Error - java.lang.OutOfMemoryError: Java heap space

PowerFlex Gateway version 3.6.6

PowerFlex Gateway scaleio.log may show the following:

2025-10-16 16:45:24,322 [https-jsse-nio-443-exec-16] DEBUG o.s.web.servlet.DispatcherServlet - Failed to complete request: jakarta.servlet.ServletException: Handler processing failed: java.lang.OutOfMemoryError: Java heap space

PowerFlex Gateway Catalina logs may show the following:

15-Oct-2025 19:41:56.301 WARNING [main] org.apache.tomcat.util.digester.SetPropertiesRule.begin Match [Server/Service/Connector] failed to set property [sessionCacheSize] to [2000]

Impact

PowerFlex API calls may fail to be processed.

Excessive memory consumption causes this error in the SSL session cache.

This occurred because the javax.net.ssl.sessionCacheSize  system property was not correctly applied.

In the server.xml configuration, the attribute sessionCacheSize="2000" was incorrectly placed inside the <Connector> element.

Tomcat 10 ignores this property when defined there, resulting in unbounded SSL session growth, and an eventual OutOfMemoryError.

• Connect to the PowerFlex Gateway server.
• Modify the following file:   

  /opt/emc/scaleio/gateway/conf/server.xml

• With in the server.xml file, move the configuration setting inside the SSLHostConfig Tag: 

  sessionCacheSize="2000"

   

• Save the file.
•  The changes will look like below  

  <SSLHostConfig
                      clientAuth="${client.auth}"
                      sslProtocol="TLS"
                      protocols="TLSv1.2"
                      sessionCacheSize="2000"
                      truststoreFile="${truststore.file}"
                      truststorePassword="${truststore.password}"
                      trustManagerClassName="${trust.manager.class.name}"
                      ciphers="TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_256_CCM,TLS_ECDHE_ECDSA_WITH_AES_256_CCM_8">
                  <Certificate
                          certificateKeystoreFile="${keystore.file}"
                          certificateKeystorePassword="${keystore.password}" />
  
              </SSLHostConfig>

• Restart the PowerFlex Gateway service

  systemctl restart scaleio-gateway

Impacted Versions

PowerFlex 3.6.6

Fixed In Version

PowerFlex 3.6.7