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| -rw-r--r-- | core/src/main/scala/org/apache/spark/storage/BlockManagerMasterActor.scala | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/core/src/main/scala/org/apache/spark/storage/BlockManagerMasterActor.scala b/core/src/main/scala/org/apache/spark/storage/BlockManagerMasterActor.scala index 52a424db22..a028783757 100644 --- a/core/src/main/scala/org/apache/spark/storage/BlockManagerMasterActor.scala +++ b/core/src/main/scala/org/apache/spark/storage/BlockManagerMasterActor.scala @@ -348,6 +348,10 @@ object BlockManagerMasterActor { if (storageLevel.isValid) { // isValid means it is either stored in-memory or on-disk. + // But the memSize here indicates the data size in or dropped from memory, + // and the diskSize here indicates the data size in or dropped to disk. + // They can be both large than 0, when a block is dropped from memory to disk. + // Therefore, a safe way to set BlockStatus is to set its info in accurate modes. if (storageLevel.useMemory) { _blocks.put(blockId, BlockStatus(storageLevel, memSize, 0)) _remainingMem -= memSize |