After installation of the QFSDP for Exadata, I found that I couldn't run any cellcli command on one particular storage cell in interactive mode. Switch '-n' (non-interactive mode) for cellcli worked fine though.
The culprit was a cellcli history file :
/root/.jline3-oracle.ossmgmt.ms.cli.CellCLI.history
which contained almost 1M lines. As the result the CPU of a storage server was overloaded by java trying to build an array of command history in the memory and after couple of minutes java thrown the exception like this :
CellCLI> help
Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
CellCLI> help at java.util.Arrays.copyOfRange(Arrays.java:3664)
at java.lang.String.<init>(String.java:207)
at java.lang.String.substring(String.java:1933)
at org.jline.reader.impl.history.DefaultHistory.lambda$trimHistory$2(DefaultHistory.java:255)
at org.jline.reader.impl.history.DefaultHistory$$Lambda$187/1144648478.accept(Unknown Source)
at java.util.Iterator.forEachRemaining(Iterator.java:116)
at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801)
at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:580)
at org.jline.reader.impl.history.DefaultHistory.trimHistory(DefaultHistory.java:252)
at org.jline.reader.impl.history.DefaultHistory.internalWrite(DefaultHistory.java:241)
at org.jline.reader.impl.history.DefaultHistory.save(DefaultHistory.java:219)
at org.jline.reader.impl.history.DefaultHistory.add(DefaultHistory.java:384)
at oracle.ossmgmt.common.util.MyLineReader$MyHistory.add(MyLineReader.java:329)
at org.jline.reader.impl.LineReaderImpl.finish(LineReaderImpl.java:1140)
at org.jline.reader.impl.LineReaderImpl.finishBuffer(LineReaderImpl.java:1109)
at org.jline.reader.impl.LineReaderImpl.readLine(LineReaderImpl.java:689)
at org.jline.reader.impl.LineReaderImpl.readLine(LineReaderImpl.java:468)
at oracle.ossmgmt.common.util.MyLineReader.readLine(MyLineReader.java:197)
at oracle.ossmgmt.common.util.MyLineReader.readLineCliImpl(MyLineReader.java:173)
at oracle.ossmgmt.ms.cli.CellCLI.readAndProcessLine(CellCLI.java:695)
at oracle.ossmgmt.common.cli.CLIImpl.processCommands(CLIImpl.java:595)
at oracle.ossmgmt.ms.cli.CellCLI.processCommands(CellCLI.java:639)
at oracle.ossmgmt.ms.cli.CellCLI.main(CellCLI.java:355)
The solution - to rename (to move) the cellcli history file.
