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https://issues.apache.org/jira/browse/KNOX-784?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16684095#comment-16684095
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Kevin Risden commented on KNOX-784:
-----------------------------------
Attached a patch that exposes the connection manager and sets the name for the
connection manager metric to prevent the issue identified in the description.
Needs some more testing but think this is an improvement.
> java.lang.IllegalArgumentException: A metric named
> org.apache.http.conn.HttpClientConnectionManager.available-connections
> already exists
> -----------------------------------------------------------------------------------------------------------------------------------------
>
> Key: KNOX-784
> URL: https://issues.apache.org/jira/browse/KNOX-784
> Project: Apache Knox
> Issue Type: Bug
> Reporter: Nishant Bangarwa
> Assignee: Kevin Risden
> Priority: Major
> Fix For: 1.3.0
>
> Attachments: KNOX-784.patch
>
>
> Facing this error on latest trunk version -
> {code:java}
> Caused by: java.lang.IllegalArgumentException: A metric named
> org.apache.http.conn.HttpClientConnectionManager.available-connections
> already exists
> at com.codahale.metrics.MetricRegistry.register(MetricRegistry.java:91)
> at
> com.codahale.metrics.httpclient.InstrumentedHttpClientConnectionManager.<init>(InstrumentedHttpClientConnectionManager.java:63)
> at
> com.codahale.metrics.httpclient.InstrumentedHttpClientConnectionManager.<init>(InstrumentedHttpClientConnectionManager.java:49)
> at
> com.codahale.metrics.httpclient.InstrumentedHttpClientConnectionManager.<init>(InstrumentedHttpClientConnectionManager.java:41)
> at
> com.codahale.metrics.httpclient.InstrumentedHttpClientConnectionManager.<init>(InstrumentedHttpClientConnectionManager.java:36)
> at
> org.apache.hadoop.gateway.services.metrics.impl.instr.InstrHttpClientBuilderProvider.getInstrumented(InstrHttpClientBuilderProvider.java:41)
> at
> org.apache.hadoop.gateway.services.metrics.impl.instr.InstrHttpClientBuilderProvider.getInstrumented(InstrHttpClientBuilderProvider.java:36)
> at
> org.apache.hadoop.gateway.services.metrics.impl.DefaultMetricsService.getInstrumented(DefaultMetricsService.java:128)
> at
> org.apache.hadoop.gateway.dispatch.DefaultHttpClientFactory.createHttpClient(DefaultHttpClientFactory.java:67)
> at
> org.apache.hadoop.gateway.dispatch.GatewayDispatchFilter.init(GatewayDispatchFilter.java:75)
> at
> org.apache.hadoop.gateway.GatewayFilter$Holder.getInstance(GatewayFilter.java:362){code}
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