Examples with UDFClassLoader org.apache.hadoop.hive.ql.exec.UDFClassLoader used on opensource projects

Example 1 with UDFClassLoader

use of org.apache.hadoop.hive.ql.exec.UDFClassLoader in project hive by apache.

the class FunctionLocalizer method refreshClassloader.

public void refreshClassloader() throws IOException {
    if (recentlyLocalizedJars.isEmpty())
        return;
    String[] jars = recentlyLocalizedJars.toArray(new String[0]);
    recentlyLocalizedJars.clear();
    ClassLoader updatedCl = null;
    try {
        AddToClassPathAction addAction = new AddToClassPathAction(executorClassloader, Arrays.asList(jars));
        updatedCl = AccessController.doPrivileged(addAction);
        if (LOG.isInfoEnabled()) {
            LOG.info("Added " + jars.length + " jars to classpath");
        }
    } catch (Throwable t) {
        // TODO: we could fall back to trying one by one and only ignore the failed ones.
        logRefreshError("Unable to localize jars: ", jars, t);
        // logRefreshError always throws.
        return;
    }
    if (updatedCl != executorClassloader) {
        throw new AssertionError("Classloader was replaced despite using UDFClassLoader: new " + updatedCl + ", old " + executorClassloader);
    }
    String[] classNames = recentlyLocalizedClasses.toArray(jars);
    recentlyLocalizedClasses.clear();
    try {
        for (String className : classNames) {
            allowedUdfClasses.put(Class.forName(className, false, executorClassloader), Boolean.TRUE);
        }
    } catch (Throwable t) {
        // TODO: we could fall back to trying one by one and only ignore the failed ones.
        logRefreshError("Unable to instantiate localized classes: ", classNames, t);
        // logRefreshError always throws.
        return;
    }
}