Support multi ledger directories for rocksdb backend entryMetadataMap #2965
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@rdhabalia @merlimat @zymap @eolivelli Please help take a look, thanks. |
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rerun failure checks |
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rerun failure checks |
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rerun failure checks |
StevenLuMT
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Feb 16, 2022
…apache#2965) When we use RocksDB backend entryMetadataMap for multi ledger directories configured, the bookie start up failed, and throw the following exception. ``` 12:24:28.530 [main] ERROR org.apache.pulsar.PulsarStandaloneStarter - Failed to start pulsar service. java.io.IOException: Error open RocksDB database at org.apache.bookkeeper.bookie.storage.ldb.KeyValueStorageRocksDB.<init>(KeyValueStorageRocksDB.java:202) ~[org.apache.bookkeeper-bookkeeper-server-4.15.0-SNAPSHOT.jar:4.15.0-SNAPSHOT] at org.apache.bookkeeper.bookie.storage.ldb.KeyValueStorageRocksDB.<init>(KeyValueStorageRocksDB.java:89) ~[org.apache.bookkeeper-bookkeeper-server-4.15.0-SNAPSHOT.jar:4.15.0-SNAPSHOT] at org.apache.bookkeeper.bookie.storage.ldb.KeyValueStorageRocksDB.lambda$static$0(KeyValueStorageRocksDB.java:62) ~[org.apache.bookkeeper-bookkeeper-server-4.15.0-SNAPSHOT.jar:4.15.0-SNAPSHOT] at org.apache.bookkeeper.bookie.storage.ldb.PersistentEntryLogMetadataMap.<init>(PersistentEntryLogMetadataMap.java:87) ~[org.apache.bookkeeper-bookkeeper-server-4.15.0-SNAPSHOT.jar:4.15.0-SNAPSHOT] at org.apache.bookkeeper.bookie.GarbageCollectorThread.createEntryLogMetadataMap(GarbageCollectorThread.java:265) ~[org.apache.bookkeeper-bookkeeper-server-4.15.0-SNAPSHOT.jar:4.15.0-SNAPSHOT] at org.apache.bookkeeper.bookie.GarbageCollectorThread.<init>(GarbageCollectorThread.java:154) ~[org.apache.bookkeeper-bookkeeper-server-4.15.0-SNAPSHOT.jar:4.15.0-SNAPSHOT] at org.apache.bookkeeper.bookie.GarbageCollectorThread.<init>(GarbageCollectorThread.java:133) ~[org.apache.bookkeeper-bookkeeper-server-4.15.0-SNAPSHOT.jar:4.15.0-SNAPSHOT] at org.apache.bookkeeper.bookie.storage.ldb.SingleDirectoryDbLedgerStorage.<init>(SingleDirectoryDbLedgerStorage.java:182) ~[org.apache.bookkeeper-bookkeeper-server-4.15.0-SNAPSHOT.jar:4.15.0-SNAPSHOT] at org.apache.bookkeeper.bookie.storage.ldb.DbLedgerStorage.newSingleDirectoryDbLedgerStorage(DbLedgerStorage.java:190) ~[org.apache.bookkeeper-bookkeeper-server-4.15.0-SNAPSHOT.jar:4.15.0-SNAPSHOT] at org.apache.bookkeeper.bookie.storage.ldb.DbLedgerStorage.initialize(DbLedgerStorage.java:150) ~[org.apache.bookkeeper-bookkeeper-server-4.15.0-SNAPSHOT.jar:4.15.0-SNAPSHOT] at org.apache.bookkeeper.bookie.BookieResources.createLedgerStorage(BookieResources.java:110) ~[org.apache.bookkeeper-bookkeeper-server-4.15.0-SNAPSHOT.jar:4.15.0-SNAPSHOT] at org.apache.pulsar.zookeeper.LocalBookkeeperEnsemble.buildBookie(LocalBookkeeperEnsemble.java:328) ~[org.apache.pulsar-pulsar-zookeeper-utils-2.8.1.jar:2.8.1] at org.apache.pulsar.zookeeper.LocalBookkeeperEnsemble.runBookies(LocalBookkeeperEnsemble.java:391) ~[org.apache.pulsar-pulsar-zookeeper-utils-2.8.1.jar:2.8.1] at org.apache.pulsar.zookeeper.LocalBookkeeperEnsemble.startStandalone(LocalBookkeeperEnsemble.java:521) ~[org.apache.pulsar-pulsar-zookeeper-utils-2.8.1.jar:2.8.1] at org.apache.pulsar.PulsarStandalone.start(PulsarStandalone.java:264) ~[org.apache.pulsar-pulsar-broker-2.8.1.jar:2.8.1] at org.apache.pulsar.PulsarStandaloneStarter.main(PulsarStandaloneStarter.java:121) [org.apache.pulsar-pulsar-broker-2.8.1.jar:2.8.1] Caused by: org.rocksdb.RocksDBException: lock hold by current process, acquire time 1640492668 acquiring thread 123145515651072: data/standalone/bookkeeper00/entrylogIndexCache/metadata-cache/LOCK: No locks available at org.rocksdb.RocksDB.open(Native Method) ~[org.rocksdb-rocksdbjni-6.10.2.jar:?] at org.rocksdb.RocksDB.open(RocksDB.java:239) ~[org.rocksdb-rocksdbjni-6.10.2.jar:?] at org.apache.bookkeeper.bookie.storage.ldb.KeyValueStorageRocksDB.<init>(KeyValueStorageRocksDB.java:199) ~[org.apache.bookkeeper-bookkeeper-server-4.15.0-SNAPSHOT.jar:4.15.0-SNAPSHOT] ... 15 more ``` The reason is multi garbageCollectionThread will open the same RocksDB and own the LOCK, and then throw the above exception. 1. Change the default GcEntryLogMetadataCachePath from `getLedgerDirNames()[0] + "/" + ENTRYLOG_INDEX_CACHE` to `null`. If it is `null`, it will use each ledger's directory. 2. Remove the internal directory `entrylogIndexCache`. The data structure looks like: ``` └── current ├── lastMark ├── ledgers │ ├── 000003.log │ ├── CURRENT │ ├── IDENTITY │ ├── LOCK │ ├── LOG │ ├── MANIFEST-000001 │ └── OPTIONS-000005 ├── locations │ ├── 000003.log │ ├── CURRENT │ ├── IDENTITY │ ├── LOCK │ ├── LOG │ ├── MANIFEST-000001 │ └── OPTIONS-000005 └── metadata-cache ├── 000003.log ├── CURRENT ├── IDENTITY ├── LOCK ├── LOG ├── MANIFEST-000001 └── OPTIONS-000005 ``` 3. If user configured `GcEntryLogMetadataCachePath` in `bk_server.conf`, it only support one ledger directory configured for `ledgerDirectories`. Otherwise, the best practice is to keep it default. 4. The PR is better to release with apache#1949
Ghatage
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Jul 12, 2024
…apache#2965) ### Motivation When we use RocksDB backend entryMetadataMap for multi ledger directories configured, the bookie start up failed, and throw the following exception. ``` 12:24:28.530 [main] ERROR org.apache.pulsar.PulsarStandaloneStarter - Failed to start pulsar service. java.io.IOException: Error open RocksDB database at org.apache.bookkeeper.bookie.storage.ldb.KeyValueStorageRocksDB.<init>(KeyValueStorageRocksDB.java:202) ~[org.apache.bookkeeper-bookkeeper-server-4.15.0-SNAPSHOT.jar:4.15.0-SNAPSHOT] at org.apache.bookkeeper.bookie.storage.ldb.KeyValueStorageRocksDB.<init>(KeyValueStorageRocksDB.java:89) ~[org.apache.bookkeeper-bookkeeper-server-4.15.0-SNAPSHOT.jar:4.15.0-SNAPSHOT] at org.apache.bookkeeper.bookie.storage.ldb.KeyValueStorageRocksDB.lambda$static$0(KeyValueStorageRocksDB.java:62) ~[org.apache.bookkeeper-bookkeeper-server-4.15.0-SNAPSHOT.jar:4.15.0-SNAPSHOT] at org.apache.bookkeeper.bookie.storage.ldb.PersistentEntryLogMetadataMap.<init>(PersistentEntryLogMetadataMap.java:87) ~[org.apache.bookkeeper-bookkeeper-server-4.15.0-SNAPSHOT.jar:4.15.0-SNAPSHOT] at org.apache.bookkeeper.bookie.GarbageCollectorThread.createEntryLogMetadataMap(GarbageCollectorThread.java:265) ~[org.apache.bookkeeper-bookkeeper-server-4.15.0-SNAPSHOT.jar:4.15.0-SNAPSHOT] at org.apache.bookkeeper.bookie.GarbageCollectorThread.<init>(GarbageCollectorThread.java:154) ~[org.apache.bookkeeper-bookkeeper-server-4.15.0-SNAPSHOT.jar:4.15.0-SNAPSHOT] at org.apache.bookkeeper.bookie.GarbageCollectorThread.<init>(GarbageCollectorThread.java:133) ~[org.apache.bookkeeper-bookkeeper-server-4.15.0-SNAPSHOT.jar:4.15.0-SNAPSHOT] at org.apache.bookkeeper.bookie.storage.ldb.SingleDirectoryDbLedgerStorage.<init>(SingleDirectoryDbLedgerStorage.java:182) ~[org.apache.bookkeeper-bookkeeper-server-4.15.0-SNAPSHOT.jar:4.15.0-SNAPSHOT] at org.apache.bookkeeper.bookie.storage.ldb.DbLedgerStorage.newSingleDirectoryDbLedgerStorage(DbLedgerStorage.java:190) ~[org.apache.bookkeeper-bookkeeper-server-4.15.0-SNAPSHOT.jar:4.15.0-SNAPSHOT] at org.apache.bookkeeper.bookie.storage.ldb.DbLedgerStorage.initialize(DbLedgerStorage.java:150) ~[org.apache.bookkeeper-bookkeeper-server-4.15.0-SNAPSHOT.jar:4.15.0-SNAPSHOT] at org.apache.bookkeeper.bookie.BookieResources.createLedgerStorage(BookieResources.java:110) ~[org.apache.bookkeeper-bookkeeper-server-4.15.0-SNAPSHOT.jar:4.15.0-SNAPSHOT] at org.apache.pulsar.zookeeper.LocalBookkeeperEnsemble.buildBookie(LocalBookkeeperEnsemble.java:328) ~[org.apache.pulsar-pulsar-zookeeper-utils-2.8.1.jar:2.8.1] at org.apache.pulsar.zookeeper.LocalBookkeeperEnsemble.runBookies(LocalBookkeeperEnsemble.java:391) ~[org.apache.pulsar-pulsar-zookeeper-utils-2.8.1.jar:2.8.1] at org.apache.pulsar.zookeeper.LocalBookkeeperEnsemble.startStandalone(LocalBookkeeperEnsemble.java:521) ~[org.apache.pulsar-pulsar-zookeeper-utils-2.8.1.jar:2.8.1] at org.apache.pulsar.PulsarStandalone.start(PulsarStandalone.java:264) ~[org.apache.pulsar-pulsar-broker-2.8.1.jar:2.8.1] at org.apache.pulsar.PulsarStandaloneStarter.main(PulsarStandaloneStarter.java:121) [org.apache.pulsar-pulsar-broker-2.8.1.jar:2.8.1] Caused by: org.rocksdb.RocksDBException: lock hold by current process, acquire time 1640492668 acquiring thread 123145515651072: data/standalone/bookkeeper00/entrylogIndexCache/metadata-cache/LOCK: No locks available at org.rocksdb.RocksDB.open(Native Method) ~[org.rocksdb-rocksdbjni-6.10.2.jar:?] at org.rocksdb.RocksDB.open(RocksDB.java:239) ~[org.rocksdb-rocksdbjni-6.10.2.jar:?] at org.apache.bookkeeper.bookie.storage.ldb.KeyValueStorageRocksDB.<init>(KeyValueStorageRocksDB.java:199) ~[org.apache.bookkeeper-bookkeeper-server-4.15.0-SNAPSHOT.jar:4.15.0-SNAPSHOT] ... 15 more ``` The reason is multi garbageCollectionThread will open the same RocksDB and own the LOCK, and then throw the above exception. ### Modification 1. Change the default GcEntryLogMetadataCachePath from `getLedgerDirNames()[0] + "/" + ENTRYLOG_INDEX_CACHE` to `null`. If it is `null`, it will use each ledger's directory. 2. Remove the internal directory `entrylogIndexCache`. The data structure looks like: ``` └── current ├── lastMark ├── ledgers │ ├── 000003.log │ ├── CURRENT │ ├── IDENTITY │ ├── LOCK │ ├── LOG │ ├── MANIFEST-000001 │ └── OPTIONS-000005 ├── locations │ ├── 000003.log │ ├── CURRENT │ ├── IDENTITY │ ├── LOCK │ ├── LOG │ ├── MANIFEST-000001 │ └── OPTIONS-000005 └── metadata-cache ├── 000003.log ├── CURRENT ├── IDENTITY ├── LOCK ├── LOG ├── MANIFEST-000001 └── OPTIONS-000005 ``` 3. If user configured `GcEntryLogMetadataCachePath` in `bk_server.conf`, it only support one ledger directory configured for `ledgerDirectories`. Otherwise, the best practice is to keep it default. 4. The PR is better to release with apache#1949
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Motivation
When we use RocksDB backend entryMetadataMap for multi ledger directories configured, the bookie start up failed, and throw the following exception.
The reason is multi garbageCollectionThread will open the same RocksDB and own the LOCK, and then throw the above exception.
Modification
getLedgerDirNames()[0] + "/" + ENTRYLOG_INDEX_CACHEtonull. If it isnull, it will use each ledger's directory.entrylogIndexCache. The data structure looks like:GcEntryLogMetadataCachePathinbk_server.conf, it only support one ledger directory configured forledgerDirectories. Otherwise, the best practice is to keep it default.