System may be unstable: HTTPS WSO2 EI 6.6.0 - wso2

Question

I have the next error in the product WSO2 EI 6.6.0.
{org.apache.synapse.transport.passthru.PassThroughHttpSSLSender} - System may be unstable: HTTPS ConnectingIOReactor encountered a runtime exception : null java.lang.NullPointerException
at org.apache.http.conn.ssl.AbstractVerifier.verify(AbstractVerifier.java:193)
at org.apache.synapse.transport.http.conn.ClientSSLSetupHandler$1.verify(ClientSSLSetupHandler.java:82)
at org.apache.http.conn.ssl.AbstractVerifier.verify(AbstractVerifier.java:159)
at org.apache.http.conn.ssl.AbstractVerifier.verify(AbstractVerifier.java:147)
at org.apache.synapse.transport.http.conn.ClientSSLSetupHandler.verify(ClientSSLSetupHandler.java:181)
at org.apache.http.nio.reactor.ssl.SSLIOSession.doHandshake(SSLIOSession.java:313)
at org.apache.http.nio.reactor.ssl.SSLIOSession.isAppInputReady(SSLIOSession.java:424)
at org.apache.http.impl.nio.reactor.AbstractIODispatch.inputReady(AbstractIODispatch.java:119)
at org.apache.http.impl.nio.reactor.BaseIOReactor.readable(BaseIOReactor.java:159)
at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvent(AbstractIOReactor.java:338)
at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvents(AbstractIOReactor.java:316)
at org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIOReactor.java:277)
at org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIOReactor.java:105)
at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run(AbstractMultiworkerIOReactor.java:586)
at java.lang.Thread.run(Thread.java:748)
I am only trying to do a call mediator
<call>
<endpoint name="GETToken">
<address uri="api.backend"/>
</endpoint>
</call>
I am using a proxy in the axis2.xml file and in the integrator.sh file like:
axis2.xml
<transportSender name="http" class="org.apache.synapse.transport.passthru.PassThroughHttpSender">
<parameter name="non-blocking" locked="false">true</parameter>
<!--<parameter name="warnOnHTTP500" locked="false">*</parameter>
<parameter name="http.proxyHost" locked="false">proxy.com</parameter>
<parameter name="http.proxyPort" locked="false">8080</parameter>-->
<parameter name="http.nonProxyHosts" locked="false">.*.domain.com|localhost|10.*.*.*</parameter>
</transportSender>
<transportSender name="https" class="org.apache.synapse.transport.passthru.PassThroughHttpSSLSender">
<parameter name="non-blocking" locked="false">true</parameter>
<!--<parameter name="http.proxyHost" locked="false">proxy.com</parameter>
<parameter name="http.proxyPort" locked="false">8080</parameter> -->
<parameter name="http.nonProxyHosts" locked="false">.*.domain.com|localhost|10.*.*.*</parameter>
<parameter name="keystore" locked="false">
integrator.sh
-Dhttps.proxyHost="proxy.com" \
-Dhttps.proxyPort="8080" \
-Dhttp.proxyHost="proxy.com" \
-Dhttp.proxyPort="8080" \
-Dhttp.nonProxyHosts="localhost|10.*.*.*|*.domain.com" \
I see the next question, but it hasn't any response:
Error in EI - System may be unstable: HTTPS ConnectingIOReactor encountered a runtime exception

Answer 1

The problem was related with HostName verification, so I change the next line
<parameter name="HostnameVerifier">Strict|AllowAll|DefaultAndLocalhost</parameter>
in the axis2.xml that you can find in the route: wso2ei-6.6.0\conf\axis2