Can you please file JIRA at https://issues.apache.org/jira/browse/ZEPPELIN
On Tue, Mar 31, 2020 at 12:19 PM Artem P <yoneda...@gmail.com> wrote:
> Hi! I am experiencing the following error after clicking Enable on any
> Helium module (full stack trace in file attachement):
> ```
> Caused by: java.lang.NullPointerException
> at
> org.apache.zeppelin.helium.HeliumBundleFactory.bundleHeliumPackage(HeliumBundleFactory.java:388)
> at
> org.apache.zeppelin.helium.HeliumBundleFactory.buildPackage(HeliumBundleFactory.java:455)
> at org.apache.zeppelin.helium.Helium.enable(Helium.java:287)
> at
> org.apache.zeppelin.rest.HeliumRestApi.enablePackage(HeliumRestApi.java:209)
> ```
> Zeppelin version 0.8.2 on EMR. It worked before, but broke after Zeppelin
> server restart.
>
> The exception rises in the following function:
> ```
> private synchronized File bundleHeliumPackage(FrontendPluginFactory fpf,
> File bundleDir) throws
> IOException {
> try {
> out.reset();
> logger.info("Bundling helium packages");
> yarnCommand(fpf, "run bundle");
> logger.info("Bundled helium packages");
> } catch (TaskRunnerException e) {
> throw new IOException(new String(out.toByteArray()));
> }
>
> String bundleStdoutResult = new String(out.toByteArray());
> File heliumBundle = new File(bundleDir, HELIUM_BUNDLE);
> if (!heliumBundle.isFile()) {
> throw new IOException(
> "Can't create bundle: \n" + bundleStdoutResult);
> }
>
> WebpackResult result = getWebpackResultFromOutput(bundleStdoutResult);
> if (result.errors.length > 0) {
> FileUtils.deleteQuietly(heliumBundle);
> throw new IOException(result.errors[0]);
> }
>
> return heliumBundle;
> }
> ```
> NullPointerException occurs at line with `if (result.errors.length > 0)`.
> I tried to reproduce it by running `yarn run bundle` manually in bash, but
> it successfully finishes and returns json with empty errors array in it.
>
--
With best wishes, Alex Ott
http://alexott.net/
Twitter: alexott_en (English), alexott (Russian)
