Container of SSL problems that can occur; possible causes and solutions

SSL Troubleshooting

Possible causes:
- Truststore not found
- Truststore does not contain the required entry (correctly).
  The java library io-webservices-api communicates with https://api.webservices.io and requires a valid public key with this domain in its truststore.
Possible solution:
-  Add entry to truststore. See http://webservices.io/ssl
Associated stacktrace:

Exception in thread "main" org.springframework.web.client.ResourceAccessException: I/O error: peer not authenticated; nested exception is javax.net.ssl.SSLPeerUnverifiedException: peer not authenticated
	at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:461)
	at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:409)
	at org.springframework.web.client.RestTemplate.postForObject(RestTemplate.java:287)
	at io.webservices.api.document.DocumentConverterClient.convert(DocumentConverterClient.java:55)
	at io.webservices.api.document.DocumentConverterDemo.main(DocumentConverterDemo.java:59)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)
Caused by: javax.net.ssl.SSLPeerUnverifiedException: peer not authenticated
	at com.sun.net.ssl.internal.ssl.SSLSessionImpl.getPeerCertificates(SSLSessionImpl.java:352)
	at org.apache.http.conn.ssl.AbstractVerifier.verify(AbstractVerifier.java:128)
	at org.apache.http.conn.ssl.SSLSocketFactory.connectSocket(SSLSocketFactory.java:572)
	at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:180)
	at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:151)
	at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:125)
	at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:640)
	at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:479)
	at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:906)
	at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:805)
	at org.springframework.http.client.HttpComponentsClientHttpRequest.executeInternal(HttpComponentsClientHttpRequest.java:88)
	at org.springframework.http.client.AbstractBufferingClientHttpRequest.executeInternal(AbstractBufferingClientHttpRequest.java:46)
	at org.springframework.http.client.AbstractClientHttpRequest.execute(AbstractClientHttpRequest.java:49)
	at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:446)
	... 9 more