Jared Stehler created FLINK-6663:
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Summary: NPE on web startup when disabling web submissions
Key: FLINK-6663
URL: https://issues.apache.org/jira/browse/FLINK-6663
Project: Flink
Issue Type: Bug
Components: Webfrontend
Affects Versions: 1.3.0
Reporter: Jared Stehler
The web frontend fails to start when I disable web submissions, with a null
pointer for upload dir:
2017-05-22 16:56:42.818 [main] ERROR
org.apache.flink.runtime.webmonitor.WebMonitorUtils - WebServer could not be
created
java.lang.NullPointerException: null
at
org.apache.flink.util.Preconditions.checkNotNull(Preconditions.java:58)
at
org.apache.flink.runtime.webmonitor.utils.WebFrontendBootstrap.<init>(WebFrontendBootstrap.java:65)
at
org.apache.flink.runtime.webmonitor.WebRuntimeMonitor.<init>(WebRuntimeMonitor.java:385)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at
org.apache.flink.runtime.webmonitor.WebMonitorUtils.startWebRuntimeMonitor(WebMonitorUtils.java:140)
at
org.apache.flink.runtime.clusterframework.BootstrapTools.startWebMonitorIfConfigured(BootstrapTools.java:195)
at
org.apache.flink.mesos.runtime.clusterframework.MesosApplicationMasterRunner.runPrivileged(MesosApplicationMasterRunner.java:325)
at
org.apache.flink.mesos.runtime.clusterframework.MesosApplicationMasterRunner$1.call(MesosApplicationMasterRunner.java:181)
at
org.apache.flink.mesos.runtime.clusterframework.MesosApplicationMasterRunner$1.call(MesosApplicationMasterRunner.java:178)
at
org.apache.flink.runtime.security.HadoopSecurityContext$1.run(HadoopSecurityContext.java:43)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657)
at
org.apache.flink.runtime.security.HadoopSecurityContext.runSecured(HadoopSecurityContext.java:40)
at
org.apache.flink.mesos.runtime.clusterframework.MesosApplicationMasterRunner.run(MesosApplicationMasterRunner.java:178)
at
org.apache.flink.mesos.runtime.clusterframework.MesosApplicationMasterRunner.main(MesosApplicationMasterRunner.java:139)
This seems to be due to the code explicitly setting it to null?
final boolean webSubmitAllow = cfg.isProgramSubmitEnabled();
if (webSubmitAllow) {
// create storage for uploads
this.uploadDir = getUploadDir(config);
// the upload directory should either 1. exist and
writable or 2. can be created and writable
if (!(uploadDir.exists() && uploadDir.canWrite()) &&
!(uploadDir.mkdir() && uploadDir.canWrite())) {
throw new IOException(
String.format("Jar upload directory %s
cannot be created or is not writable.",
uploadDir.getAbsolutePath()));
}
LOG.info("Using directory {} for web frontend JAR file
uploads", uploadDir);
}
else {
this.uploadDir = null;
}
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