[SPARK-15736][CORE][branch-1.6] Gracefully handle loss of DiskStore files #13479
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/cc @andrewor14, this is the branch-1.6 backport of my other patch. |
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Test build #59889 has finished for PR 13479 at commit
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Merging into 1.6. |
asfgit
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…iles If an RDD partition is cached on disk and the DiskStore file is lost, then reads of that cached partition will fail and the missing partition is supposed to be recomputed by a new task attempt. In the current BlockManager implementation, however, the missing file does not trigger any metadata updates / does not invalidate the cache, so subsequent task attempts will be scheduled on the same executor and the doomed read will be repeatedly retried, leading to repeated task failures and eventually a total job failure. In order to fix this problem, the executor with the missing file needs to properly mark the corresponding block as missing so that it stops advertising itself as a cache location for that block. This patch fixes this bug and adds an end-to-end regression test (in `FailureSuite`) and a set of unit tests (`in BlockManagerSuite`). This is a branch-1.6 backport of #13473. Author: Josh Rosen <[email protected]> Closes #13479 from JoshRosen/handle-missing-cache-files-branch-1.6.
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can you delete branch |
zzcclp
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Jun 3, 2016
…iles If an RDD partition is cached on disk and the DiskStore file is lost, then reads of that cached partition will fail and the missing partition is supposed to be recomputed by a new task attempt. In the current BlockManager implementation, however, the missing file does not trigger any metadata updates / does not invalidate the cache, so subsequent task attempts will be scheduled on the same executor and the doomed read will be repeatedly retried, leading to repeated task failures and eventually a total job failure. In order to fix this problem, the executor with the missing file needs to properly mark the corresponding block as missing so that it stops advertising itself as a cache location for that block. This patch fixes this bug and adds an end-to-end regression test (in `FailureSuite`) and a set of unit tests (`in BlockManagerSuite`). This is a branch-1.6 backport of apache#13473. Author: Josh Rosen <[email protected]> Closes apache#13479 from JoshRosen/handle-missing-cache-files-branch-1.6. (cherry picked from commit 4259a28)
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If an RDD partition is cached on disk and the DiskStore file is lost, then reads of that cached partition will fail and the missing partition is supposed to be recomputed by a new task attempt. In the current BlockManager implementation, however, the missing file does not trigger any metadata updates / does not invalidate the cache, so subsequent task attempts will be scheduled on the same executor and the doomed read will be repeatedly retried, leading to repeated task failures and eventually a total job failure.
In order to fix this problem, the executor with the missing file needs to properly mark the corresponding block as missing so that it stops advertising itself as a cache location for that block.
This patch fixes this bug and adds an end-to-end regression test (in
FailureSuite) and a set of unit tests (in BlockManagerSuite).This is a branch-1.6 backport of #13473.