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From: Gregory Vortman
Sent: Tuesday, November 21, 2017 6:49 PM
To: u...@geode.apache.org; dev@geode.apache.org
Cc: *Technology - Digital - BSS – Charging - GEODE team 
<pbgrcmrmgeodet...@int.amdocs.com>; Guy Turkenits <guy.turken...@amdocs.com>
Subject: DiskStore exception while region data evicted
Hi team,
One of the grid members went down and entire cache is closed whenever Partition 
region got an LRU threshold and overflow to disk is started:
<lru-entry-count maximum="200000" action="overflow-to-disk"/>

Disk-store defined with 40GB.

Actual metrics while crashed: entries on disk 700000, bytes only on disk ~1GB.
There is much room in the File system.

Can you help to understand the following exception:

[severe 2017/11/21 15:41:05.678 IST host1-pwinfo1 <Asynchronous disk writer for 
region ExternalRecord-overflow> tid=0xdc] Fatal error from asynchronous flusher 
thread
org.apache.geode.InternalGemFireError: Bucket 
BucketRegion[path='/__PR/_B__EXTERNAL__RECORDS__1_171;serial=6025;primary=true] 
size (-1425) negative after applying delta of -2401
        at 
org.apache.geode.internal.cache.BucketRegion.updateBucketMemoryStats(BucketRegion.java:2291)
        at 
org.apache.geode.internal.cache.BucketRegion.updateBucket2Size(BucketRegion.java:2279)
        at 
org.apache.geode.internal.cache.BucketRegion.updateSizeOnEvict(BucketRegion.java:2157)
        at 
org.apache.geode.internal.cache.DiskEntry$Helper.writeEntryToDisk(DiskEntry.java:1441)
        at 
org.apache.geode.internal.cache.DiskEntry$Helper.doAsyncFlush(DiskEntry.java:1388)
        at 
org.apache.geode.internal.cache.DiskStoreImpl$FlusherThread.run(DiskStoreImpl.java:1729)
        at java.lang.Thread.run(Thread.java:748)

[error 2017/11/21 15:41:05.679 IST host1-pwinfo1 <Asynchronous disk writer for 
region ExternalRecord-overflow> tid=0xdc] A DiskAccessException has occurred 
while writing to the disk for disk sto
re ExternalRecord-overflow. The cache will be closed.
org.apache.geode.cache.DiskAccessException: For DiskStore: 
ExternalRecord-overflow: Fatal error from asynchronous flusher thread, caused 
by org.apache.geode.InternalGemFireError: Bucket BucketRegion
[path='/__PR/_B__EXTERNAL__RECORDS__1_171;serial=6025;primary=true] size 
(-1425) negative after applying delta of -2401
        at 
org.apache.geode.internal.cache.DiskStoreImpl$FlusherThread.run(DiskStoreImpl.java:1774)
        at java.lang.Thread.run(Thread.java:748)
Caused by: org.apache.geode.InternalGemFireError: Bucket 
BucketRegion[path='/__PR/_B__EXTERNAL__RECORDS__1_171;serial=6025;primary=true] 
size (-1425) negative after applying delta of -2401
        at 
org.apache.geode.internal.cache.BucketRegion.updateBucketMemoryStats(BucketRegion.java:2291)
        at 
org.apache.geode.internal.cache.BucketRegion.updateBucket2Size(BucketRegion.java:2279)
        at 
org.apache.geode.internal.cache.BucketRegion.updateSizeOnEvict(BucketRegion.java:2157)
        at 
org.apache.geode.internal.cache.DiskEntry$Helper.writeEntryToDisk(DiskEntry.java:1441)
        at 
org.apache.geode.internal.cache.DiskEntry$Helper.doAsyncFlush(DiskEntry.java:1388)
        at 
org.apache.geode.internal.cache.DiskStoreImpl$FlusherThread.run(DiskStoreImpl.java:1729)
        ... 1 more

Thanks

Gregory Vortman


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