javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?

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Unrecognized SSL message, plaintext connection?
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Unrecognized SSL message, plaintext connection?
javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?
at sun.security.ssl.InputRecord.handleUnknownRecord(InputRecord.java:710)
at sun.security.ssl.InputRecord.read(InputRecord.java:527)
at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:973)
at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1375)
at sun.security.ssl.SSLSocketImpl.writeRecord(SSLSocketImpl.java:747)
at sun.security.ssl.AppOutputStream.write(AppOutputStream.java:123)
at org.apache.http.impl.io.AbstractSessionOutputBuffer.flushBuffer(AbstractSessionOutputBuffer.java:159)
at org.apache.http.impl.io.AbstractSessionOutputBuffer.flush(AbstractSessionOutputBuffer.java:166)
at org.apache.http.impl.AbstractHttpClientConnection.doFlush(AbstractHttpClientConnection.java:272)
at org.apache.http.impl.AbstractHttpClientConnection.flush(AbstractHttpClientConnection.java:277)
at org.apache.http.impl.conn.ManagedClientConnectionImpl.flush(ManagedClientConnectionImpl.java:175)
at org.apache.http.protocol.HttpRequestExecutor.doSendRequest(HttpRequestExecutor.java:239)
at org.apache.http.impl.client.DefaultRequestDirector.tryExecute(DefaultRequestDirector.java:717)
at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:522)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:906)
at org.jboss.resteasy.client.core.executors.ApacheHttpClient4Executor.execute(ApacheHttpClient4Executor.java:109)
at org.jboss.resteasy.core.interception.ClientExecutionContextImpl.proceed(ClientExecutionContextImpl.java:39)
at org.jboss.resteasy.plugins.interceptors.encoding.AcceptEncodingGZIPInterceptor.execute(AcceptEncodingGZIPInterceptor.java:40)
at org.jboss.resteasy.core.interception.ClientExecutionContextImpl.proceed(ClientExecutionContextImpl.java:45)
at org.jboss.resteasy.client.ClientRequest.execute(ClientRequest.java:443)
at org.jboss.resteasy.client.ClientRequest.httpMethod(ClientRequest.java:677)
at org.jboss.resteasy.client.ClientRequest.get(ClientRequest.java:479)
at org.xdi.oxauth.client.OpenIdConfigurationClient._execOpenIdConfiguration(OpenIdConfigurationClient.java:102)
at org.xdi.oxauth.client.OpenIdConfigurationClient.execOpenIdConfiguration(OpenIdConfigurationClient.java:78)
at org.xdi.oxd.server.service.DiscoveryService.getConnectDiscoveryResponse(DiscoveryService.java:60)
at org.xdi.oxd.server.op.ImplicitFlowOperation.execute(ImplicitFlowOperation.java:42)

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