Description
These test failures are likely caused by a JVM bug. We should catch and work around it to be able report other existing metrics:
https://jenkins.thetaphi.de/job/Lucene-Solr-6.x-Linux/3138/testReport/junit/org.apache.solr.handler.admin/MetricsHandlerTest/testCompact/
java.lang.InternalError: Memory Pool not found
at __randomizedtesting.SeedInfo.seed([8F4813A324434093:A1485FF45CBE4A6C]:0)
at sun.management.MemoryPoolImpl.getUsage0(Native Method)
at sun.management.MemoryPoolImpl.getUsage(MemoryPoolImpl.java:96)
at com.codahale.metrics.jvm.MemoryUsageGaugeSet$18.getValue(MemoryUsageGaugeSet.java:177)
at com.codahale.metrics.jvm.MemoryUsageGaugeSet$18.getValue(MemoryUsageGaugeSet.java:174)
at org.apache.solr.util.stats.MetricUtils.convertGauge(MetricUtils.java:215)
at org.apache.solr.util.stats.MetricUtils.lambda$toMaps$4(MetricUtils.java:142)
at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184)
at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175)
at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175)
at java.util.TreeMap$KeySpliterator.forEachRemaining(TreeMap.java:2746)
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481)
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471)
at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151)
at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174)
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:418)
at org.apache.solr.util.stats.MetricUtils.toMaps(MetricUtils.java:135)
at org.apache.solr.util.stats.MetricUtils.toNamedList(MetricUtils.java:117)
at org.apache.solr.handler.admin.MetricsHandler.handleRequestBody(MetricsHandler.java:85)
at org.apache.solr.handler.admin.MetricsHandlerTest.testCompact(MetricsHandlerTest.java:160)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
See here for a possible explanation (thanks Hoss!): https://bugs.openjdk.java.net/browse/JDK-8025089