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The following commit(s) were added to refs/heads/trunk by this push:
new 27cb5518216 HADOOP-18829. S3A prefetch LRU cache eviction metrics
(#5893)
27cb5518216 is described below
commit 27cb55182168b00dcbc3613af3475a2327997d0a
Author: Viraj Jasani <vjas...@apache.org>
AuthorDate: Thu Sep 21 01:01:44 2023 -0800
HADOOP-18829. S3A prefetch LRU cache eviction metrics (#5893)
Contributed by: Viraj Jasani
---
.../fs/impl/prefetch/CachingBlockManager.java | 12 +++--
.../impl/prefetch/EmptyPrefetchingStatistics.java | 5 +++
.../fs/impl/prefetch/PrefetchingStatistics.java | 5 +++
.../fs/impl/prefetch/SingleFilePerBlockCache.java | 51 ++++++++++++++--------
.../hadoop/fs/statistics/StreamStatisticNames.java | 12 +++++
.../hadoop/fs/impl/prefetch/TestBlockCache.java | 6 +--
.../fs/statistics/IOStatisticAssertions.java | 37 ++++++++++++++++
.../apache/hadoop/fs/s3a/S3AInstrumentation.java | 11 ++++-
.../java/org/apache/hadoop/fs/s3a/Statistic.java | 10 +++++
.../fs/s3a/prefetch/S3ACachingBlockManager.java | 3 +-
.../statistics/impl/EmptyS3AStatisticsContext.java | 5 +++
.../fs/s3a/ITestS3APrefetchingLruEviction.java | 12 +++++
.../hadoop/fs/s3a/prefetch/S3APrefetchFakes.java | 5 ++-
13 files changed, 145 insertions(+), 29 deletions(-)
diff --git
a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/impl/prefetch/CachingBlockManager.java
b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/impl/prefetch/CachingBlockManager.java
index 4461c118625..407cd630048 100644
---
a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/impl/prefetch/CachingBlockManager.java
+++
b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/impl/prefetch/CachingBlockManager.java
@@ -36,6 +36,7 @@ import org.slf4j.LoggerFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.LocalDirAllocator;
import org.apache.hadoop.fs.statistics.DurationTracker;
+import org.apache.hadoop.fs.statistics.DurationTrackerFactory;
import static java.util.Objects.requireNonNull;
@@ -111,8 +112,10 @@ public abstract class CachingBlockManager extends
BlockManager {
* @param conf the configuration.
* @param localDirAllocator the local dir allocator instance.
* @param maxBlocksCount max blocks count to be kept in cache at any time.
+ * @param trackerFactory tracker with statistics to update.
* @throws IllegalArgumentException if bufferPoolSize is zero or negative.
*/
+ @SuppressWarnings("checkstyle:parameternumber")
public CachingBlockManager(
ExecutorServiceFuturePool futurePool,
BlockData blockData,
@@ -120,7 +123,8 @@ public abstract class CachingBlockManager extends
BlockManager {
PrefetchingStatistics prefetchingStatistics,
Configuration conf,
LocalDirAllocator localDirAllocator,
- int maxBlocksCount) {
+ int maxBlocksCount,
+ DurationTrackerFactory trackerFactory) {
super(blockData);
Validate.checkPositiveInteger(bufferPoolSize, "bufferPoolSize");
@@ -136,7 +140,7 @@ public abstract class CachingBlockManager extends
BlockManager {
if (this.getBlockData().getFileSize() > 0) {
this.bufferPool = new BufferPool(bufferPoolSize,
this.getBlockData().getBlockSize(),
this.prefetchingStatistics);
- this.cache = this.createCache(maxBlocksCount);
+ this.cache = this.createCache(maxBlocksCount, trackerFactory);
}
this.ops = new BlockOperations();
@@ -559,8 +563,8 @@ public abstract class CachingBlockManager extends
BlockManager {
}
}
- protected BlockCache createCache(int maxBlocksCount) {
- return new SingleFilePerBlockCache(prefetchingStatistics, maxBlocksCount);
+ protected BlockCache createCache(int maxBlocksCount, DurationTrackerFactory
trackerFactory) {
+ return new SingleFilePerBlockCache(prefetchingStatistics, maxBlocksCount,
trackerFactory);
}
protected void cachePut(int blockNumber, ByteBuffer buffer) throws
IOException {
diff --git
a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/impl/prefetch/EmptyPrefetchingStatistics.java
b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/impl/prefetch/EmptyPrefetchingStatistics.java
index 177ff7abab8..d20a3272868 100644
---
a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/impl/prefetch/EmptyPrefetchingStatistics.java
+++
b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/impl/prefetch/EmptyPrefetchingStatistics.java
@@ -57,6 +57,11 @@ public final class EmptyPrefetchingStatistics
}
+ @Override
+ public void blockEvictedFromFileCache() {
+
+ }
+
@Override
public void prefetchOperationCompleted() {
diff --git
a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/impl/prefetch/PrefetchingStatistics.java
b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/impl/prefetch/PrefetchingStatistics.java
index 9ce2dec5889..d1ea600be72 100644
---
a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/impl/prefetch/PrefetchingStatistics.java
+++
b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/impl/prefetch/PrefetchingStatistics.java
@@ -42,6 +42,11 @@ public interface PrefetchingStatistics extends
IOStatisticsSource {
*/
void blockRemovedFromFileCache();
+ /**
+ * A block has been evicted from the file cache.
+ */
+ void blockEvictedFromFileCache();
+
/**
* A prefetch operation has completed.
*/
diff --git
a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/impl/prefetch/SingleFilePerBlockCache.java
b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/impl/prefetch/SingleFilePerBlockCache.java
index 6aacb4d7c84..ecf7e38f4f7 100644
---
a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/impl/prefetch/SingleFilePerBlockCache.java
+++
b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/impl/prefetch/SingleFilePerBlockCache.java
@@ -47,10 +47,14 @@ import org.slf4j.LoggerFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.LocalDirAllocator;
+import org.apache.hadoop.fs.statistics.DurationTracker;
+import org.apache.hadoop.fs.statistics.DurationTrackerFactory;
import org.apache.hadoop.util.Preconditions;
import static java.util.Objects.requireNonNull;
import static org.apache.hadoop.fs.impl.prefetch.Validate.checkNotNull;
+import static
org.apache.hadoop.fs.statistics.IOStatisticsSupport.stubDurationTrackerFactory;
+import static
org.apache.hadoop.fs.statistics.StreamStatisticNames.STREAM_FILE_CACHE_EVICTION;
/**
* Provides functionality necessary for caching blocks of data read from
FileSystem.
@@ -99,6 +103,11 @@ public class SingleFilePerBlockCache implements BlockCache {
private final PrefetchingStatistics prefetchingStatistics;
+ /**
+ * Duration tracker factory required to track the duration of some
operations.
+ */
+ private final DurationTrackerFactory trackerFactory;
+
/**
* File attributes attached to any intermediate temporary file created
during index creation.
*/
@@ -209,14 +218,19 @@ public class SingleFilePerBlockCache implements
BlockCache {
*
* @param prefetchingStatistics statistics for this stream.
* @param maxBlocksCount max blocks count to be kept in cache at any time.
+ * @param trackerFactory tracker with statistics to update
*/
- public SingleFilePerBlockCache(PrefetchingStatistics prefetchingStatistics,
int maxBlocksCount) {
+ public SingleFilePerBlockCache(PrefetchingStatistics prefetchingStatistics,
+ int maxBlocksCount,
+ DurationTrackerFactory trackerFactory) {
this.prefetchingStatistics = requireNonNull(prefetchingStatistics);
this.closed = new AtomicBoolean(false);
this.maxBlocksCount = maxBlocksCount;
Preconditions.checkArgument(maxBlocksCount > 0, "maxBlocksCount should be
more than 0");
blocks = new ConcurrentHashMap<>();
blocksLock = new ReentrantReadWriteLock();
+ this.trackerFactory = trackerFactory != null
+ ? trackerFactory : stubDurationTrackerFactory();
}
/**
@@ -430,25 +444,28 @@ public class SingleFilePerBlockCache implements
BlockCache {
* @param elementToPurge Block entry to evict.
*/
private void deleteBlockFileAndEvictCache(Entry elementToPurge) {
- boolean lockAcquired = elementToPurge.takeLock(Entry.LockType.WRITE,
- PrefetchConstants.PREFETCH_WRITE_LOCK_TIMEOUT,
- PrefetchConstants.PREFETCH_WRITE_LOCK_TIMEOUT_UNIT);
- if (!lockAcquired) {
- LOG.error("Cache file {} deletion would not be attempted as write lock
could not"
- + " be acquired within {} {}", elementToPurge.path,
+ try (DurationTracker ignored =
trackerFactory.trackDuration(STREAM_FILE_CACHE_EVICTION)) {
+ boolean lockAcquired = elementToPurge.takeLock(Entry.LockType.WRITE,
PrefetchConstants.PREFETCH_WRITE_LOCK_TIMEOUT,
PrefetchConstants.PREFETCH_WRITE_LOCK_TIMEOUT_UNIT);
- } else {
- try {
- if (Files.deleteIfExists(elementToPurge.path)) {
- entryListSize--;
- prefetchingStatistics.blockRemovedFromFileCache();
- blocks.remove(elementToPurge.blockNumber);
+ if (!lockAcquired) {
+ LOG.error("Cache file {} deletion would not be attempted as write lock
could not"
+ + " be acquired within {} {}", elementToPurge.path,
+ PrefetchConstants.PREFETCH_WRITE_LOCK_TIMEOUT,
+ PrefetchConstants.PREFETCH_WRITE_LOCK_TIMEOUT_UNIT);
+ } else {
+ try {
+ if (Files.deleteIfExists(elementToPurge.path)) {
+ entryListSize--;
+ prefetchingStatistics.blockRemovedFromFileCache();
+ blocks.remove(elementToPurge.blockNumber);
+ prefetchingStatistics.blockEvictedFromFileCache();
+ }
+ } catch (IOException e) {
+ LOG.warn("Failed to delete cache file {}", elementToPurge.path, e);
+ } finally {
+ elementToPurge.releaseLock(Entry.LockType.WRITE);
}
- } catch (IOException e) {
- LOG.warn("Failed to delete cache file {}", elementToPurge.path, e);
- } finally {
- elementToPurge.releaseLock(Entry.LockType.WRITE);
}
}
}
diff --git
a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/statistics/StreamStatisticNames.java
b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/statistics/StreamStatisticNames.java
index 50bbf45505c..85b82287e37 100644
---
a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/statistics/StreamStatisticNames.java
+++
b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/statistics/StreamStatisticNames.java
@@ -455,6 +455,18 @@ public final class StreamStatisticNames {
public static final String STREAM_READ_BLOCK_ACQUIRE_AND_READ
= "stream_read_block_acquire_read";
+ /**
+ * Total number of blocks evicted from the disk cache.
+ */
+ public static final String STREAM_EVICT_BLOCKS_FROM_FILE_CACHE
+ = "stream_evict_blocks_from_cache";
+
+ /**
+ * Track duration of LRU cache eviction for disk cache.
+ */
+ public static final String STREAM_FILE_CACHE_EVICTION
+ = "stream_file_cache_eviction";
+
private StreamStatisticNames() {
}
diff --git
a/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/impl/prefetch/TestBlockCache.java
b/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/impl/prefetch/TestBlockCache.java
index b32ce20a373..a0c83a63c22 100644
---
a/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/impl/prefetch/TestBlockCache.java
+++
b/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/impl/prefetch/TestBlockCache.java
@@ -45,7 +45,7 @@ public class TestBlockCache extends AbstractHadoopTestBase {
public void testArgChecks() throws Exception {
// Should not throw.
BlockCache cache =
- new SingleFilePerBlockCache(EmptyPrefetchingStatistics.getInstance(),
2);
+ new SingleFilePerBlockCache(EmptyPrefetchingStatistics.getInstance(),
2, null);
ByteBuffer buffer = ByteBuffer.allocate(16);
@@ -55,7 +55,7 @@ public class TestBlockCache extends AbstractHadoopTestBase {
intercept(NullPointerException.class, null,
- () -> new SingleFilePerBlockCache(null, 2));
+ () -> new SingleFilePerBlockCache(null, 2, null));
}
@@ -63,7 +63,7 @@ public class TestBlockCache extends AbstractHadoopTestBase {
@Test
public void testPutAndGet() throws Exception {
BlockCache cache =
- new SingleFilePerBlockCache(EmptyPrefetchingStatistics.getInstance(),
2);
+ new SingleFilePerBlockCache(EmptyPrefetchingStatistics.getInstance(),
2, null);
ByteBuffer buffer1 = ByteBuffer.allocate(BUFFER_SIZE);
for (byte i = 0; i < BUFFER_SIZE; i++) {
diff --git
a/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/statistics/IOStatisticAssertions.java
b/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/statistics/IOStatisticAssertions.java
index 755599f0c39..8396cbd258d 100644
---
a/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/statistics/IOStatisticAssertions.java
+++
b/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/statistics/IOStatisticAssertions.java
@@ -176,6 +176,23 @@ public final class IOStatisticAssertions {
verifyStatisticsNotNull(stats).counters(), value);
}
+ /**
+ * Assert that two counters have similar values.
+ *
+ * @param stats statistics source.
+ * @param key1 statistic first key.
+ * @param key2 statistic second key.
+ */
+ public static void verifyStatisticCounterValues(
+ final IOStatistics stats,
+ final String key1,
+ final String key2) {
+ verifyStatisticValues(COUNTER,
+ key1,
+ key2,
+ verifyStatisticsNotNull(stats).counters());
+ }
+
/**
* Assert that a gauge has an expected value.
* @param stats statistics source
@@ -258,6 +275,26 @@ public final class IOStatisticAssertions {
return statistic;
}
+ /**
+ * Assert that the given two statistics have same values.
+ *
+ * @param type type of the statistics.
+ * @param key1 statistic first key.
+ * @param key2 statistic second key.
+ * @param map map to look up.
+ * @param <E> type of map element.
+ */
+ private static <E> void verifyStatisticValues(
+ final String type,
+ final String key1,
+ final String key2,
+ final Map<String, E> map) {
+ final E statistic1 = lookupStatistic(type, key1, map);
+ final E statistic2 = lookupStatistic(type, key2, map);
+ assertThat(statistic1)
+ .describedAs("%s named %s and %s named %s", type, key1, type, key2)
+ .isEqualTo(statistic2);
+ }
/**
* Assert that a given statistic has an expected value.
diff --git
a/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/S3AInstrumentation.java
b/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/S3AInstrumentation.java
index 48977b51057..9d34457ab94 100644
---
a/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/S3AInstrumentation.java
+++
b/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/S3AInstrumentation.java
@@ -886,7 +886,8 @@ public class S3AInstrumentation implements Closeable,
MetricsSource,
StreamStatisticNames.STREAM_READ_VECTORED_INCOMING_RANGES,
StreamStatisticNames.STREAM_READ_VECTORED_OPERATIONS,
StreamStatisticNames.STREAM_READ_VECTORED_READ_BYTES_DISCARDED,
- StreamStatisticNames.STREAM_READ_VERSION_MISMATCHES)
+ StreamStatisticNames.STREAM_READ_VERSION_MISMATCHES,
+ StreamStatisticNames.STREAM_EVICT_BLOCKS_FROM_FILE_CACHE)
.withGauges(STREAM_READ_GAUGE_INPUT_POLICY,
STREAM_READ_BLOCKS_IN_FILE_CACHE.getSymbol(),
STREAM_READ_ACTIVE_PREFETCH_OPERATIONS.getSymbol(),
@@ -899,7 +900,8 @@ public class S3AInstrumentation implements Closeable,
MetricsSource,
StreamStatisticNames.STREAM_READ_REMOTE_STREAM_DRAINED,
StreamStatisticNames.STREAM_READ_PREFETCH_OPERATIONS,
StreamStatisticNames.STREAM_READ_REMOTE_BLOCK_READ,
- StreamStatisticNames.STREAM_READ_BLOCK_ACQUIRE_AND_READ)
+ StreamStatisticNames.STREAM_READ_BLOCK_ACQUIRE_AND_READ,
+ StreamStatisticNames.STREAM_FILE_CACHE_EVICTION)
.build();
setIOStatistics(st);
aborted = st.getCounterReference(
@@ -1395,6 +1397,11 @@ public class S3AInstrumentation implements Closeable,
MetricsSource,
incAllGauges(STREAM_READ_BLOCKS_IN_FILE_CACHE, -1);
}
+ @Override
+ public void blockEvictedFromFileCache() {
+ increment(StreamStatisticNames.STREAM_EVICT_BLOCKS_FROM_FILE_CACHE);
+ }
+
@Override
public void prefetchOperationCompleted() {
incAllGauges(STREAM_READ_ACTIVE_PREFETCH_OPERATIONS, -1);
diff --git
a/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/Statistic.java
b/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/Statistic.java
index ae761fe270f..b5f7fcbcd01 100644
---
a/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/Statistic.java
+++
b/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/Statistic.java
@@ -447,6 +447,16 @@ public enum Statistic {
"Total queue duration of all block uploads",
TYPE_DURATION),
+ /* Stream prefetch file cache eviction */
+ STREAM_EVICT_BLOCKS_FROM_FILE_CACHE(
+ StreamStatisticNames.STREAM_EVICT_BLOCKS_FROM_FILE_CACHE,
+ "Count of blocks evicted from the disk cache",
+ TYPE_COUNTER),
+ STREAM_FILE_CACHE_EVICTION(
+ StreamStatisticNames.STREAM_FILE_CACHE_EVICTION,
+ "Duration of the eviction of an element from LRU cache that holds disk
cache blocks",
+ TYPE_DURATION),
+
/* committer stats */
COMMITTER_COMMITS_CREATED(
"committer_commits_created",
diff --git
a/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/prefetch/S3ACachingBlockManager.java
b/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/prefetch/S3ACachingBlockManager.java
index a02922053aa..e008de3a79d 100644
---
a/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/prefetch/S3ACachingBlockManager.java
+++
b/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/prefetch/S3ACachingBlockManager.java
@@ -76,7 +76,8 @@ public class S3ACachingBlockManager extends
CachingBlockManager {
streamStatistics,
conf,
localDirAllocator,
- conf.getInt(PREFETCH_MAX_BLOCKS_COUNT,
DEFAULT_PREFETCH_MAX_BLOCKS_COUNT));
+ conf.getInt(PREFETCH_MAX_BLOCKS_COUNT,
DEFAULT_PREFETCH_MAX_BLOCKS_COUNT),
+ streamStatistics);
Validate.checkNotNull(reader, "reader");
diff --git
a/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/statistics/impl/EmptyS3AStatisticsContext.java
b/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/statistics/impl/EmptyS3AStatisticsContext.java
index 6454065b240..e47656efd18 100644
---
a/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/statistics/impl/EmptyS3AStatisticsContext.java
+++
b/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/statistics/impl/EmptyS3AStatisticsContext.java
@@ -241,6 +241,11 @@ public final class EmptyS3AStatisticsContext implements
S3AStatisticsContext {
}
+ @Override
+ public void blockEvictedFromFileCache() {
+
+ }
+
@Override
public void executorAcquired(Duration timeInQueue) {
diff --git
a/hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/s3a/ITestS3APrefetchingLruEviction.java
b/hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/s3a/ITestS3APrefetchingLruEviction.java
index a8211e24ce7..0fa08f37cf9 100644
---
a/hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/s3a/ITestS3APrefetchingLruEviction.java
+++
b/hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/s3a/ITestS3APrefetchingLruEviction.java
@@ -45,7 +45,11 @@ import org.apache.hadoop.test.LambdaTestUtils;
import static org.apache.hadoop.fs.s3a.Constants.PREFETCH_BLOCK_SIZE_KEY;
import static org.apache.hadoop.fs.s3a.Constants.PREFETCH_ENABLED_KEY;
import static org.apache.hadoop.fs.s3a.Constants.PREFETCH_MAX_BLOCKS_COUNT;
+import static
org.apache.hadoop.fs.statistics.IOStatisticAssertions.assertThatStatisticCounter;
+import static
org.apache.hadoop.fs.statistics.IOStatisticAssertions.verifyStatisticCounterValues;
import static
org.apache.hadoop.fs.statistics.IOStatisticAssertions.verifyStatisticGaugeValue;
+import static
org.apache.hadoop.fs.statistics.StreamStatisticNames.STREAM_EVICT_BLOCKS_FROM_FILE_CACHE;
+import static
org.apache.hadoop.fs.statistics.StreamStatisticNames.STREAM_FILE_CACHE_EVICTION;
import static
org.apache.hadoop.fs.statistics.StreamStatisticNames.STREAM_READ_BLOCKS_IN_FILE_CACHE;
/**
@@ -172,6 +176,14 @@ public class ITestS3APrefetchingLruEviction extends
AbstractS3ACostTest {
LambdaTestUtils.eventually(TIMEOUT_MILLIS, INTERVAL_MILLIS, () -> {
LOG.info("IO stats: {}", ioStats);
verifyStatisticGaugeValue(ioStats, STREAM_READ_BLOCKS_IN_FILE_CACHE, 0);
+ // stream_evict_blocks_from_cache is expected to be higher than 4,
however we might face
+ // transient failures due to async prefetch get cancel issues. While
TIMEOUT_MILLIS is
+ // sufficient wait time, consider re-running the test if
stream_evict_blocks_from_cache
+ // value stays lower than 4.
+ assertThatStatisticCounter(ioStats,
+ STREAM_EVICT_BLOCKS_FROM_FILE_CACHE).isGreaterThanOrEqualTo(4);
+ verifyStatisticCounterValues(ioStats,
STREAM_EVICT_BLOCKS_FROM_FILE_CACHE,
+ STREAM_FILE_CACHE_EVICTION);
});
}
diff --git
a/hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/s3a/prefetch/S3APrefetchFakes.java
b/hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/s3a/prefetch/S3APrefetchFakes.java
index 3bf9965861f..89477a90719 100644
---
a/hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/s3a/prefetch/S3APrefetchFakes.java
+++
b/hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/s3a/prefetch/S3APrefetchFakes.java
@@ -59,6 +59,7 @@ import
org.apache.hadoop.fs.s3a.statistics.S3AInputStreamStatistics;
import org.apache.hadoop.fs.s3a.statistics.S3AStatisticsContext;
import org.apache.hadoop.fs.s3a.statistics.impl.CountingChangeTracker;
import org.apache.hadoop.fs.s3a.statistics.impl.EmptyS3AStatisticsContext;
+import org.apache.hadoop.fs.statistics.DurationTrackerFactory;
import org.apache.hadoop.io.retry.RetryPolicies;
import org.apache.hadoop.io.retry.RetryPolicy;
import org.apache.hadoop.util.functional.CallableRaisingIOE;
@@ -308,7 +309,7 @@ public final class S3APrefetchFakes {
public FakeS3FilePerBlockCache(int readDelay, int writeDelay) {
super(new EmptyS3AStatisticsContext().newInputStreamStatistics(),
- Constants.DEFAULT_PREFETCH_MAX_BLOCKS_COUNT);
+ Constants.DEFAULT_PREFETCH_MAX_BLOCKS_COUNT, null);
this.files = new ConcurrentHashMap<>();
this.readDelay = readDelay;
this.writeDelay = writeDelay;
@@ -381,7 +382,7 @@ public final class S3APrefetchFakes {
}
@Override
- protected BlockCache createCache(int maxBlocksCount) {
+ protected BlockCache createCache(int maxBlocksCount,
DurationTrackerFactory trackerFactory) {
final int readDelayMs = 50;
final int writeDelayMs = 200;
return new FakeS3FilePerBlockCache(readDelayMs, writeDelayMs);
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