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https://issues.apache.org/jira/browse/NIFI-1698?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15218801#comment-15218801
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ASF GitHub Bot commented on NIFI-1698:
--------------------------------------
GitHub user bbende opened a pull request:
https://github.com/apache/nifi/pull/313
NIFI-1698 Improving customValidate in AbstractHadoopProcessor and HBa…
…seClient service to not reload Configuration unless it changed
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/bbende/nifi NIFI-1698
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/nifi/pull/313.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #313
----
commit 1859ed8660219650a54fbcf5504809302c7c6ac9
Author: Bryan Bende <[email protected]>
Date: 2016-03-30T19:56:22Z
NIFI-1698 Improving customValidate in AbstractHadoopProcessor and
HBaseClient service to not reload Configuration unless it changed
----
> UI interaction very sluggish with more HDFS and HBase processors on the graph
> -----------------------------------------------------------------------------
>
> Key: NIFI-1698
> URL: https://issues.apache.org/jira/browse/NIFI-1698
> Project: Apache NiFi
> Issue Type: Bug
> Affects Versions: 0.6.0
> Reporter: Joseph Witt
> Assignee: Bryan Bende
> Priority: Critical
>
> There is a very noticeable slow-down that is more obvious on slower
> systems/clusters when more and more HDFS processors exist or when more and
> more HBase processors exist. If they are enabled or running then it can
> cause tremendous slowdowns in response time by a multiple of 2-10x. This in
> turn leads the UI to be unresponsive.
> Stacktraces such as this one are commonly present:
> {quote}
> "Clustering Tasks Thread-3" Id=172 BLOCKED on java.lang.Class@600aa5f8
> at
> org.apache.nifi.hadoop.SecurityUtil.isSecurityEnabled(SecurityUtil.java:83)
> at
> org.apache.nifi.hadoop.KerberosProperties.validatePrincipalAndKeytab(KerberosProperties.java:121)
> at
> org.apache.nifi.processors.hadoop.AbstractHadoopProcessor.customValidate(AbstractHadoopProcessor.java:154)
> at
> org.apache.nifi.components.AbstractConfigurableComponent.validate(AbstractConfigurableComponent.java:123)
> at
> org.apache.nifi.controller.StandardProcessorNode.isValid(StandardProcessorNode.java:912)
> at
> org.apache.nifi.controller.FlowController.getProcessorStatus(FlowController.java:2529)
> at
> org.apache.nifi.controller.FlowController.getGroupStatus(FlowController.java:2146)
> at
> org.apache.nifi.controller.FlowController.getGroupStatus(FlowController.java:2162)
> {quote}
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