RuntimeException in Tablet.commit does not decrement writes in progress

[dlmarion]

Describe the bug
User reported the following stack trace and issue:

java.lang.NegativeArraySizeException: -27
at org.apache.core.data.Mutation.readBytes(Mutation.java:1243)
at org.apache.core.data.Mutation.deserializeColumnUpdate(Mutation.java:1283)
at org.apache.core.data.Mutation.getUpdates(Mutation.java:1267)
at org.apache.tserver.InMemoryMap$DefaultMap.mutate(InMemoryMap.java:434)
at org.apache.tserver.InMemoryMap$SampleMap.mutate(InMemoryMap.java:243)
at org.apache.tserver.InMemoryMap.mutate(InMemoryMap.java:505)
at org.apache.tserver.tablet.CommitSession.mutate(CommitSession.java:117)
at org.apache.tserver.tablet.TabletMemory.mutate(TabletMemory.java:145)
at org.apache.tserver.tablet.Tablet.commit(Tablet.java:880)
at org.apache.tserver.tablet.CommitSession.commit(CommitSession.java:86)

in the Tablet.commit code:

accumulo/server/tserver/src/main/java/org/apache/accumulo/tserver/tablet/Tablet.java

Lines 869 to 897 in 7b746cd

	public void commit(CommitSession commitSession, List<Mutation> mutations) {
	int totalCount = 0;
	long totalBytes = 0;
	// write the mutation to the in memory table
	for (Mutation mutation : mutations) {
	totalCount += mutation.size();
	totalBytes += mutation.numBytes();
	}
	getTabletMemory().mutate(commitSession, mutations, totalCount);
	synchronized (this) {
	if (isCloseComplete()) {
	throw new IllegalStateException(
	"Tablet " + extent + " closed with outstanding messages to the logger");
	}
	// decrement here in case an exception is thrown below
	decrementWritesInProgress(commitSession);
	getTabletMemory().updateMemoryUsageStats();
	numEntries += totalCount;
	numEntriesInMemory += totalCount;
	ingestCount += totalCount;
	ingestBytes += totalBytes;
	}
	}

The runtime exception thrown from getTabletMemory().mutate(commitSession, mutations, totalCount); causes the code following to be skipped. This causes the writesInProgress counter to not be decremented, which impacts other Tablet operations.

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

• Affected version(s) of this project: 2.1.2