Ivan Daschinskiy created IGNITE-8975:
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             Summary: Invalid initialization of compressed archived WAL segment 
when WAL compression is switched off.
                 Key: IGNITE-8975
                 URL: https://issues.apache.org/jira/browse/IGNITE-8975
             Project: Ignite
          Issue Type: Bug
    Affects Versions: 2.5
            Reporter: Ivan Daschinskiy
            Assignee: Ivan Daschinskiy
             Fix For: 2.7


After restarting node with WAL compression disabled and when compressed wal 
archive 
presentd, current implementation of FileWriteAheadLogManager ignores presenting 
compressed wal segment and initalizes empty brand new one. This causes 
following error:

{code:java}
2018-07-05 16:14:25.761 
[ERROR][exchange-worker-#153%DPL_GRID%DplGridNodeName%][o.a.i.i.p.c.p.c.CheckpointHistory]
 Failed to process checkpoint: CheckpointEntry 
[id=8dc4b1cc-dedd-4a57-8748-f5a7ecfd389d, timestamp=1530785506909, 
ptr=FileWALPointer [idx=4520, fileOff=860507725, len=691515]]
org.apache.ignite.IgniteCheckedException: Failed to find checkpoint record at 
the given WAL pointer: FileWALPointer [idx=4520, fileOff=860507725, len=691515]
at 
org.apache.ignite.internal.processors.cache.persistence.checkpoint.CheckpointEntry$GroupStateLazyStore.initIfNeeded(CheckpointEntry.java:346)
at 
org.apache.ignite.internal.processors.cache.persistence.checkpoint.CheckpointEntry$GroupStateLazyStore.access$300(CheckpointEntry.java:231)
at 
org.apache.ignite.internal.processors.cache.persistence.checkpoint.CheckpointEntry.initIfNeeded(CheckpointEntry.java:123)
at 
org.apache.ignite.internal.processors.cache.persistence.checkpoint.CheckpointEntry.groupState(CheckpointEntry.java:105)
at 
org.apache.ignite.internal.processors.cache.persistence.checkpoint.CheckpointHistory.isCheckpointApplicableForGroup(CheckpointHistory.java:377)
at 
org.apache.ignite.internal.processors.cache.persistence.checkpoint.CheckpointHistory.searchAndReserveCheckpoints(CheckpointHistory.java:304)
at 
org.apache.ignite.internal.processors.cache.persistence.GridCacheDatabaseSharedManager.reserveHistoryForExchange(GridCacheDatabaseSharedManager.java:1614)
at 
org.apache.ignite.internal.processors.cache.distributed.dht.preloader.GridDhtPartitionsExchangeFuture.distributedExchange(GridDhtPartitionsExchangeFuture.java:1139)
at 
org.apache.ignite.internal.processors.cache.distributed.dht.preloader.GridDhtPartitionsExchangeFuture.init(GridDhtPartitionsExchangeFuture.java:724)
at 
org.apache.ignite.internal.processors.cache.GridCachePartitionExchangeManager$ExchangeWorker.body0(GridCachePartitionExchangeManager.java:2477)
at 
org.apache.ignite.internal.processors.cache.GridCachePartitionExchangeManager$ExchangeWorker.body(GridCachePartitionExchangeManager.java:2357)
at org.apache.ignite.internal.util.worker.GridWorker.run(GridWorker.java:110)
at java.lang.Thread.run(Thread.java:745)
{code}




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