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https://issues.apache.org/jira/browse/IGNITE-16118?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Pavel Pereslegin updated IGNITE-16118:
--------------------------------------
Ignite Flags: (was: Docs Required,Release Notes Required)
> GridCacheEntryRemovedException appears in server log when performing
> concurrent cache read with expiry policy.
> --------------------------------------------------------------------------------------------------------------
>
> Key: IGNITE-16118
> URL: https://issues.apache.org/jira/browse/IGNITE-16118
> Project: Ignite
> Issue Type: Bug
> Reporter: Pavel Pereslegin
> Assignee: Pavel Pereslegin
> Priority: Minor
>
> In a rare case, you might observe a confusing
> {{GridCacheEntryRemovedException "Failed to send TTL update request"}} in
> logs while concurrently *reading a non-expired* cache value.
> {noformat}
> [ERROR][sys-#258%expiry.EntryRemovedOnReadTest2%][root] <default> Failed to
> send TTL update request.
> org.apache.ignite.internal.processors.cache.GridCacheEntryRemovedException
> at
> org.apache.ignite.internal.processors.cache.GridCacheMapEntry.checkObsolete(GridCacheMapEntry.java:3052)
> at
> org.apache.ignite.internal.processors.cache.distributed.dht.GridDhtCacheEntry.checkReadersLocked(GridDhtCacheEntry.java:732)
> at
> org.apache.ignite.internal.processors.cache.distributed.dht.GridDhtCacheEntry.checkReaders(GridDhtCacheEntry.java:708)
> at
> org.apache.ignite.internal.processors.cache.distributed.dht.GridDhtCacheEntry.readers(GridDhtCacheEntry.java:416)
> at
> org.apache.ignite.internal.processors.cache.distributed.dht.GridDhtCacheAdapter$8.run(GridDhtCacheAdapter.java:1122)
> at
> org.apache.ignite.internal.util.IgniteUtils.wrapThreadLoader(IgniteUtils.java:7329)
> at
> org.apache.ignite.internal.processors.closure.GridClosureProcessor$1.body(GridClosureProcessor.java:827)
> at
> org.apache.ignite.internal.util.worker.GridWorker.run(GridWorker.java:125)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> at java.lang.Thread.run(Thread.java:748)
> {noformat}
> It looks like there is a race between {{sendTtlUpdateRequest(UUID,
> GridCacheTtlUpdateRequest)}} and heap entry eviction, in this case, the
> keys-loop is interrupted by the NPE ( which is currently not outputting
> anywhere).
> Since ttl updates are not ordered (see IGNITE-305), it is difficult to
> reproduce the real-world problem that this issue could cause, but we
> shouldn't log a weird exception anyway and continue the loop without NPE.
> Reproducer:
> {code:java}
> public class EntryRemovedOnReadTest extends GridCommonAbstractTest {
> private final ListeningTestLogger log = new
> ListeningTestLogger(GridAbstractTest.log);
> @Override protected IgniteConfiguration getConfiguration(String
> igniteInstanceName) throws Exception {
> return super.getConfiguration(igniteInstanceName)
> .setGridLogger(log)
> .setCacheConfiguration(new CacheConfiguration<Integer,
> Integer>(DEFAULT_CACHE_NAME)
> .setAtomicityMode(CacheAtomicityMode.TRANSACTIONAL)
> .setCacheMode(REPLICATED)
> );
> }
> @Test
> public void test() throws Exception {
> LogListener lsnr = LogListener.matches("Failed to send TTL update
> request").build();
> log.registerListener(lsnr);
> startGridsMultiThreaded(4);
> Map<Integer, Integer> vals = new TreeMap<>();
> for (int i = 1; i < 10; i++)
> vals.put(i, i);
> jcache(0).putAll(vals);
> assertFalse(lsnr.check());
> long timeout = 20_000L;
> long stopTime = System.currentTimeMillis() + timeout;
> int iter = 0;
> IgniteCache<Object, Object> cache = jcache(1).withExpiryPolicy(new
> ExpiryPolicy() {
> @Override public Duration getExpiryForAccess() {
> return new Duration(TimeUnit.MILLISECONDS, timeout);
> }
> @Override public Duration getExpiryForCreation() { return null; }
> @Override public Duration getExpiryForUpdate() { return null; }
> });
> while (System.currentTimeMillis() < stopTime) {
> cache.getAll(vals.keySet());
> assertFalse("iter=" + ++iter, lsnr.check());
> }
> }
> }
> {code}
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