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apache / accumulo

Apache Accumulo
https://accumulo.apache.org
Apache License 2.0
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Monitor threw ConcurrentModificationException when loading Tablet Server page #4956

Closed austin007008 closed 4 days ago

austin007008 commented 1 month ago

Describe the bug When loading the tablet server page of the monitor, I noticed that the monitor threw a "ConcurrentModificationException" (seen on the "recent logs" page).

Versions (OS, Maven, Java, and others, as appropriate): accumulo 2.1.3

To Reproduce Steps to reproduce the behavior (or a link to an example repository that reproduces the problem): Can not reproduce

Expected behavior No ConcurrentModificationException thrown

Additional context caused by: java.util.ConcurrentmodificationException at java.util.HashMap$HashIterator.nextNode(HashMap.java:1511) at java.util.HashMap$HashIterator.next(HashMap.java:1544) at java.util.HashMap$HashIterator.next(HashMap.java:1542) at org.apache.accumulo.monitor.Monitor$EventCounter.calculateRate(monitor.java:23) at org.apache.accumulo.monitor.Monitor.getLookupRate(Monitor.java:977) at org.apache.accumulo.monitor.rest.tservers.TabletServerInformation.updateTabletServerInfo(TabletServerinformation.java:162) at org.apache.accumulo.monitor.rest.tservers.TabletServerInformation.(TabletServerInformation:101) at org.apache.accumulo.monitor.rest.tservers.TabletServer.(TabletServer.java:43) at org.apache.accumulo.monitor.rest.tservers.TabletServerResource.getTserverSummary(TabletServerResource.java:88)