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Backport "HBASE-29099 Avoid expensive BlockCacheKey.toString() calls when traci…" to branch-3 #6645

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Backport "HBASE-29099 Avoid expensive BlockCacheKey.toString() calls when traci…" to branch-3 #6645

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6 changes: 5 additions & 1 deletion hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileReaderImpl.java
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Original file line number Diff line number Diff line change
Expand Up @@ -1289,11 +1289,15 @@ public HFileBlock readBlock(long dataBlockOffset, long onDiskBlockSize, final bo

BlockCacheKey cacheKey =
new BlockCacheKey(path, dataBlockOffset, this.isPrimaryReplicaReader(), expectedBlockType);
Attributes attributes = Attributes.of(BLOCK_CACHE_KEY_KEY, cacheKey.toString());

boolean useLock = false;
IdLock.Entry lockEntry = null;
final Span span = Span.current();
// BlockCacheKey#toString() is quite expensive to call, so if tracing isn't enabled, don't
// record
Attributes attributes = span.isRecording()
? Attributes.of(BLOCK_CACHE_KEY_KEY, cacheKey.toString())
: Attributes.empty();
try {
while (true) {
// Check cache for block. If found return.
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