![]() The certificate at the third-party service may not be signed by a popular root CA or it could be signed by an intermediate CA that is not present in JRE’s trusted list.This can even be a simple version upgrade gone wrong. Something that happened in your Java framework installation directory has messed up its list of trusted providers.It is now straightforward to understand that a client application trying to access a service signed by a self-signed certificate will always end up in trouble.īut why does this error get thrown while trying to access third-party services from dependable providers? The reason can be either of the two listed below. If it does not find mention of it, Java aborts accessing the service and throws this error. It does this by checking whether the root certificate authority who signed it is present in its internal trusted list. While trying to access an API or domain secured by SSL, the Java framework checks whether the certificate used by the service is trusted. The client application can either be a package management client or third-party library or even a custom java module. As mentioned above, this error is usually thrown by Java client applications. Fixing this error needs one to have a full understanding of what is involved in an invalid certificate configuration. In a nutshell, the root cause of this error irrespective of the scenario you encountered it in is an invalid certificate configuration at the client machine. What is the problem when you see “unable to find valid certification path to requested target” Now that we understand the typical situations in which this error is found, let’s move on to understanding the root cause. A package repository like PackageCloud that just works all the time can relieve you from thinking about frustrating problems like these. Out of the three situations above, the most common occurrence of this error is while dealing with the artifact build process and package management. This error can also be seen in cases where a client application accesses a service succeed by self-signed certificates.A client library like Twitter4J that helps pull tweets by accessing Twitter APIs can trigger this error if your client machine has an outdated certificate configuration. ![]() The reason, in this case, is also the lack of certificate configuration of the parent domain in the client machine. When the developer tries to use the library in his code, the library tries to access its parent REST or SOAP API and throws this error. Another typical situation is during the use of client libraries provided by third-party services.It also comes to the light straight after a Java version change operation at the client-side. The typical reason is an outdated client certification configuration. The most common situation in which this error is faced is when a package build process tries to access the maven package repository.Some of the typical situations that trigger this error are listed below. It can be thrown during any operation that requires accessing a service that is secured using SSL encryption. What makes it difficult to troubleshoot is that this exception class can be triggered in multiple situations. caused by: : : PKIX path building failed.SunCertPathBuilderException: unable to find valid certification path to requested target ' Below is a snippet of the log messages the developer is shown while encountering this error. This is an exception handling class in Java that deals with verifying the SSL certificates of the server that the java application is trying to connect to. This error message is generally printed out by the .SunCertPathBuilderException class. The problem appears with a cryptic error message “unable to find valid certification path to requested target‘’. This post is about a common error that most java developers would have witnessed in their career.
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