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ASF GitHub Bot commented on GEODE-2676: --------------------------------------- PurelyApplied commented on a change in pull request #1063: GEODE-2676: fix NPE with ShowMetricsCommand. URL: https://github.com/apache/geode/pull/1063#discussion_r151280756 ########## File path: geode-core/src/test/java/org/apache/geode/management/internal/cli/commands/ShowMetricsCommandIntegrationTest.java ########## @@ -164,8 +158,16 @@ public void categoryOptionAbridgesOutput() throws Exception { List<String> expectedCategories = Arrays.asList("cluster", "cache", ""); logger.info("Expecting categories: " + String.join(", ", expectedCategories)); - gfsh.connectAndVerify(server.getEmbeddedLocatorPort(), PortType.locator); gfsh.executeAndAssertThat(cmd).tableHasColumnOnlyWithValues("Category", expectedCategories.toArray(new String[0])); } + + @Test + public void getRegionMetricsForPartitionedRegionWithStatistics() throws Exception { + String cmd = "create region --name=region2 --type=PARTITION --enable-statistics"; Review comment: If `RegionMBeanBridge` is going to fail the `region.getStatistics()` invocation, should we really want this command to succeed, knowing a partitioned region cannot have `--enable-statistics`? Probably beyond the scope of this ticket, but I feel like this `create region` command is invalid and should throw a `UserErrorException`. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org > RegionMBean statistics wrong on partitioned regions > --------------------------------------------------- > > Key: GEODE-2676 > URL: https://issues.apache.org/jira/browse/GEODE-2676 > Project: Geode > Issue Type: Bug > Components: management > Reporter: Fred Krone > Priority: Minor > Labels: jmx > > RegionMBean attributes hitCount, hitRatio, missCount, lastAccessedTime, and > lastModifiedTime will always be 0 for an mbean that represents an partitioned > region. > The gettors for these methods may call getStatistics() which on a PR always > throws UnsupportedOperationException. So this exception might even get > exposed to customers. > The initialization of RegionMBeanBridge calls getStatisticsEnabled() which > returns true on a PartitionedRegion. This does have meaning on a PR but it > does not mean that getStatistics() is a supported operation. On a PR setting > statistics-enabled causes each region-entry to also keep track of its last > access time. > It is true that if getStatisticsEnabled() is false then you should not call > getStatistics. But the opposite is not true. Since we currently have regions > that do not support getStatistics(), the code in RegionMBeanBridge should > catch UnsupportedOperationException and handle it. I would suggest that the > constructor be changed that initializes the "isStatisticsEnabled" field. > Instead of only calling getStatisticsEnabled() it should also call > getStatistics(). Something like this: > {noformat} > { > boolean useGetStatistics = regAttrs.getStatisticsEnabled(); > if (useGetStatistics) { > try { > region.getStatistics(); > } catch (UnsupportedOperationException ex) { > useGetStatistics = false; > } > } > this.isStatisticsEnabled = useGetStatistics; > } > {noformat} > That way in a future release if PRs are changed to support getStatistics this > code will start calling it without having a direct dependency on the > implementation of PartitionedRegion. > https://issues.apache.org/jira/browse/GEODE-2685 is a request to support > getStatistics on PRs. -- This message was sent by Atlassian JIRA (v6.4.14#64029)