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https://issues.apache.org/jira/browse/BOOKKEEPER-193?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13241055#comment-13241055
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[email protected] commented on BOOKKEEPER-193:
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bookkeeper-server/src/main/java/org/apache/bookkeeper/meta/FlatLedgerManager.java
<https://reviews.apache.org/r/4481/#comment14165>
Casting indicates that something is wrong in your abstraction. Perhaps
activeLedgers.snapshot() should return a SortedMap, and doGC() should take a
Map. It doesn't do anything that requires the ConcurrentMap interface.
bookkeeper-server/src/main/java/org/apache/bookkeeper/meta/HierarchicalLedgerManager.java
<https://reviews.apache.org/r/4481/#comment14166>
why not just have the implementation of SnapshotMap use a
ConcurrentSkipListMap?
- Ivan
On 2012-03-29 05:27:14, Sijie Guo wrote:
bq.
bq. -----------------------------------------------------------
bq. This is an automatically generated e-mail. To reply, visit:
bq. https://reviews.apache.org/r/4481/
bq. -----------------------------------------------------------
bq.
bq. (Updated 2012-03-29 05:27:14)
bq.
bq.
bq. Review request for bookkeeper.
bq.
bq.
bq. Summary
bq. -------
bq.
bq. create a snapshot of bookie active ledgers, and then fetch the list of
zookeeper metadata, then it is safe to do garbage collection.
bq.
bq.
bq. This addresses bug BOOKKEEPER-193.
bq. https://issues.apache.org/jira/browse/BOOKKEEPER-193
bq.
bq.
bq. Diffs
bq. -----
bq.
bq.
bookkeeper-server/src/main/java/org/apache/bookkeeper/meta/SnapshotMap.java
PRE-CREATION
bq.
bookkeeper-server/src/main/java/org/apache/bookkeeper/meta/FlatLedgerManager.java
100cdad
bq.
bookkeeper-server/src/main/java/org/apache/bookkeeper/meta/HierarchicalLedgerManager.java
169c906
bq.
bookkeeper-server/src/test/java/org/apache/bookkeeper/meta/GcLedgersTest.java
PRE-CREATION
bq.
bookkeeper-server/src/test/java/org/apache/bookkeeper/meta/LedgerManagerTestCase.java
PRE-CREATION
bq.
bq. Diff: https://reviews.apache.org/r/4481/diff
bq.
bq.
bq. Testing
bq. -------
bq.
bq.
bq. Thanks,
bq.
bq. Sijie
bq.
bq.
> Ledger is garbage collected by mistake.
> ---------------------------------------
>
> Key: BOOKKEEPER-193
> URL: https://issues.apache.org/jira/browse/BOOKKEEPER-193
> Project: Bookkeeper
> Issue Type: Bug
> Components: bookkeeper-server
> Reporter: Sijie Guo
> Assignee: Sijie Guo
> Priority: Blocker
> Fix For: 4.1.0
>
> Attachments: BK-193.patch, BK-193.patch_v2
>
>
> currently, we encountered such case: ledger is garbage collected by mistake,
> and following requests would fail due to NoLedgerException.
> {code}
> 2012-03-23 19:10:47,403 - INFO
> [GarbageCollectorThread:GarbageCollectorThread@234] - Garbage collecting
> deleted ledger index files.
> 2012-03-23 19:10:48,702 - INFO [GarbageCollectorThread:LedgerCache@544] -
> Deleting ledgerId: 89408
> 2012-03-23 19:10:48,703 - INFO [GarbageCollectorThread:LedgerCache@577] -
> Deleted ledger : 89408
> 2012-03-23 19:11:10,013 - ERROR [NIOServerFactory-3181:BookieServer@361] -
> Error writing 1@89408
> org.apache.bookkeeper.bookie.Bookie$NoLedgerException: Ledger 89408 not found
> at
> org.apache.bookkeeper.bookie.LedgerCache.getFileInfo(LedgerCache.java:228)
> at
> org.apache.bookkeeper.bookie.LedgerCache.updatePage(LedgerCache.java:260)
> at
> org.apache.bookkeeper.bookie.LedgerCache.putEntryOffset(LedgerCache.java:158)
> at
> org.apache.bookkeeper.bookie.LedgerDescriptor.addEntry(LedgerDescriptor.java:135)
> at
> org.apache.bookkeeper.bookie.Bookie.addEntryInternal(Bookie.java:1059)
> at org.apache.bookkeeper.bookie.Bookie.addEntry(Bookie.java:1099)
> at
> org.apache.bookkeeper.proto.BookieServer.processPacket(BookieServer.java:357)
> at
> org.apache.bookkeeper.proto.NIOServerFactory$Cnxn.readRequest(NIOServerFactory.java:315)
> at
> org.apache.bookkeeper.proto.NIOServerFactory$Cnxn.doIO(NIOServerFactory.java:213)
> at
> org.apache.bookkeeper.proto.NIOServerFactory.run(NIOServerFactory.java:124)
> {code}
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