[jira] [Created] (IGNITE-8146) IgniteUtils classLoaderUrls() JDK9 bug

[Anton Vinogradov (Jira)]

Sujit Kumar Mahapatra created IGNITE-8146:
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             Summary: IgniteUtils classLoaderUrls() JDK9 bug
                 Key: IGNITE-8146
                 URL: https://issues.apache.org/jira/browse/IGNITE-8146
             Project: Ignite
          Issue Type: Bug
          Components: general
    Affects Versions: 2.4
            Reporter: Sujit Kumar Mahapatra


Reporting a probable miss that breaks JDK9 compatibility.

As part of [this commit|https://github.com/apache/ignite/commit/ee2a6f7c3f2e3c9bd8dc61c8dbdf171e933d9481#diff-309ab4ef2fc61d6b2570d390acfb9bd6] [this commit|https://github.com/apache/ignite/commit/ee2a6f7c3f2e3c9bd8dc61c8dbdf171e933d9481#diff-309ab4ef2fc61d6b2570d390acfb9bd6]  in [ignite|https://github.com/apache/ignite/tree/f1a853ded8e835ce8c98c029cce7d5d17fbd3f52]/[modules|https://github.com/apache/ignite/tree/f1a853ded8e835ce8c98c029cce7d5d17fbd3f52/modules]/[core|https://github.com/apache/ignite/tree/f1a853ded8e835ce8c98c029cce7d5d17fbd3f52/modules/core]/[src|https://github.com/apache/ignite/tree/f1a853ded8e835ce8c98c029cce7d5d17fbd3f52/modules/core/src]/[main|https://github.com/apache/ignite/tree/f1a853ded8e835ce8c98c029cce7d5d17fbd3f52/modules/core/src/main]/[java|https://github.com/apache/ignite/tree/f1a853ded8e835ce8c98c029cce7d5d17fbd3f52/modules/core/src/main/java]/[org|https://github.com/apache/ignite/tree/f1a853ded8e835ce8c98c029cce7d5d17fbd3f52/modules/core/src/main/java/org]/[apache|https://github.com/apache/ignite/tree/f1a853ded8e835ce8c98c029cce7d5d17fbd3f52/modules/core/src/main/java/org/apache]/[ignite|https://github.com/apache/ignite/tree/f1a853ded8e835ce8c98c029cce7d5d17fbd3f52/modules/core/src/main/java/org/apache/ignite]/[internal|https://github.com/apache/ignite/tree/f1a853ded8e835ce8c98c029cce7d5d17fbd3f52/modules/core/src/main/java/org/apache/ignite/internal]/[util|https://github.com/apache/ignite/tree/f1a853ded8e835ce8c98c029cce7d5d17fbd3f52/modules/core/src/main/java/org/apache/ignite/internal/util]/*IgniteUtils.java,* below lines will throw *ClassCastException* in JDK9 during runtime.

_return ((URLClassLoader)urlClsLdrField.get(clsLdr)).getURLs();_

 

Here, _urlClsLdrField.get(clsLdr)_ return an object of type "___java.base/jdk.internal.loader.URLClassPath_" which can't be cast to "_URLClassLoader"._

 

The fix seems to be to introduce another reflection call to invoke _getURLs_  method of the internal _URLClassPath ++_++class.



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