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The GUI may display an error message instead of actual data in performance charts if a key for a queried metric disappeared

Troubleshooting


Problem

The Spectrum Scale GUI may display an error message instead of actual data in performance charts if a key for a queried metric disappeared (e.g., a node was renamed or removed from the cluster).

Symptom

The Spectrum Scale GUI may display "Error loading data" instead of actual data in different performance charts.

Cause

Due to a change in the API of the underlying component that measures performance data, no values in the "domain" field are returned anymore. This happens only for entities that were removed (or renamed). These missing "domain" values lead to a parsing exception on the GUI side.

Environment

All environments.

Diagnosing The Problem

The following exception appears in the log file /var/log/cnlog/mgtsrv/gpfsgui_trc.log:

Caused by: java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
at java.util.ArrayList.rangeCheck(ArrayList.java:668)
at java.util.ArrayList.get(ArrayList.java:444)
at com.ibm.gss.gui.performance.MetricsUtility.lambda$updateDomainInfo$4(MetricsUtility.java:311)
at com.ibm.gss.gui.performance.MetricsUtility$$Lambda$362.000000001C005DA0.apply(Unknown Source)
at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:204)
at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1393)
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:523)
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:513)
at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:719)
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:245)
at java.util.stream.ReferencePipeline.reduce(ReferencePipeline.java:490)
at java.util.stream.ReferencePipeline.max(ReferencePipeline.java:526)
at com.ibm.gss.gui.performance.MetricsUtility.updateDomainInfo(MetricsUtility.java:311)
at com.ibm.gss.gui.performance.MetricsUtility.getStats(MetricsUtility.java:211)
at com.ibm.gss.gui.performance.MetricsUtility.getFirstX(MetricsUtility.java:195)
at com.ibm.gss.gui.performance.PerfUtility.getPerfObjects(PerfUtility.java:250)
at com.ibm.gss.gui.logic.MonitorRPC.getLinesFromPartialConfigInternal(MonitorRPC.java:1102) at com.ibm.gss.gui.logic.MonitorRPC.getLinesFromPartialConfig(MonitorRPC.java:1034)
... 38 more

Resolving The Problem

Users running IBM Spectrum Scale V5.0.2.0 thru V5.0.2.1 should apply IBM Spectrum Scale V5.0.2.2 or later, available from Fix Central at: https://www.ibm.com/support/fixcentral/swg/selectFixes?parent=Software%20defined%20storage&product=ibm/StorageSoftware/IBM+Spectrum+Scale&release=5.0.2&platform=All&function=all .

Users running IBM Spectrum Scale V5.0.1.0 thru 5.0.1.2 should contact IBM Service to obtain and apply the efix for your level of code, reference APAR IJ13061.

Document Location

Worldwide

[{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"STXKQY","label":"IBM Spectrum Scale"},"Component":"","Platform":[{"code":"PF002","label":"AIX"},{"code":"PF016","label":"Linux"},{"code":"PF033","label":"Windows"}],"Version":"5.0.1, 5.0.2","Edition":"","Line of Business":{"code":"LOB26","label":"Storage"}},{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"STHMCM","label":"IBM Elastic Storage Server"},"Component":"","Platform":[{"code":"PF016","label":"Linux"}],"Version":"5.3.1","Edition":"","Line of Business":{"code":"LOB26","label":"Storage"}}]

Document Information

Modified date:
31 January 2019

UID

ibm10744521

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