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 This message and the information contained herein is proprietary and confidential and subject to the Amdocs policy statement, you may review at https://www.amdocs.com/about/email-disclaimer <https://www.amdocs.com/about/email-disclaimer>