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[SPARK-53128][CORE] Include unmanaged memory bytes in the usage log before execution memory OOM #51848

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[SPARK-53128][CORE] Include unmanaged memory bytes in the usage log before execution memory OOM #51848

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[SPARK-53128][CORE] Include unmanaged memory bytes in the usage log b…
zhztheplayer Aug 5, 2025
25d34b7
fixup
zhztheplayer Nov 3, 2025
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7 changes: 5 additions & 2 deletions core/src/main/java/org/apache/spark/memory/TaskMemoryManager.java
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Expand Up @@ -339,9 +339,12 @@ public void showMemoryUsage() {
MDC.of(LogKeys.MEMORY_SIZE, memoryNotAccountedFor),
MDC.of(LogKeys.TASK_ATTEMPT_ID, taskAttemptId));
logger.info(
"{} bytes of memory are used for execution and {} bytes of memory are used for storage",
"{} bytes of memory are used for execution " +
"and {} bytes of memory are used for storage " +
"and {} bytes of unmanaged memory are used",
MDC.of(LogKeys.EXECUTION_MEMORY_SIZE, memoryManager.executionMemoryUsed()),
MDC.of(LogKeys.STORAGE_MEMORY_SIZE, memoryManager.storageMemoryUsed()));
MDC.of(LogKeys.STORAGE_MEMORY_SIZE, memoryManager.storageMemoryUsed()),
MDC.of(LogKeys.MEMORY_SIZE, UnifiedMemoryManager$.MODULE$.getUnmanagedMemoryUsed()));
}
}

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8 changes: 8 additions & 0 deletions core/src/main/scala/org/apache/spark/memory/UnifiedMemoryManager.scala
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Expand Up @@ -273,6 +273,14 @@ object UnifiedMemoryManager extends Logging {
// Atomic flag to ensure polling is only started once per JVM
private val pollingStarted = new AtomicBoolean(false)

/**
* Returns the total unmanaged memory in bytes, including both
* on-heap unmanaged memory and off-heap unmanaged memory.
*/
private[spark] def getUnmanagedMemoryUsed: Long = {
UnifiedMemoryManager.unmanagedOnHeapUsed.get() + UnifiedMemoryManager.unmanagedOffHeapUsed.get()
}

/**
* Register an unmanaged memory consumer to track its memory usage.
*
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