dlmarion commented on code in PR #3508:
URL: https://github.com/apache/accumulo/pull/3508#discussion_r1240298340
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test/src/main/java/org/apache/accumulo/test/functional/MemoryFreeingIterator.java:
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@@ -28,23 +28,39 @@
import org.apache.accumulo.core.iterators.IteratorEnvironment;
import org.apache.accumulo.core.iterators.SortedKeyValueIterator;
import org.apache.accumulo.core.iterators.WrappingIterator;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
public class MemoryFreeingIterator extends WrappingIterator {
- @Override
- public void init(SortedKeyValueIterator<Key,Value> source,
Map<String,String> options,
- IteratorEnvironment env) throws IOException {
- super.init(source, options, env);
+ private static final Logger LOG =
LoggerFactory.getLogger(MemoryFreeingIterator.class);
+
+ @SuppressFBWarnings(value = "DM_GC", justification = "gc is okay for test")
+ public MemoryFreeingIterator() {
+ super();
+ LOG.info("Freeing consumed memory");
MemoryConsumingIterator.freeBuffers();
while (this.isRunningLowOnMemory()) {
+ System.gc();
Review Comment:
I agree that System.gc is a hint and may do nothing. The real thing that
needs to occur is the call to `MemoryConsumingIterator.freeBuffers()`. The JVM
GC should eventually run as the system tries to use more memory. Will it cause
a flaky test? Unknown.
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