PowerFlex 3.X: SDS process panics intermittently when running vtree migration in FG SP

Summary: SDS process may panic intermittently when Fine Granularity (FG) vtree migration is performed.

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Symptoms

The SDS'es panic with the below stack trace as below on function spefStorageRegion_FillCompressedMessage

2023/02/13 08:23:46.078303 Panic in file /data/build/workspace/ScaleIO-Common-Job/src/tgt/storage/spef_impl/spef_storage_region.c, line 4943, function spefStorageRegion_FillCompressedMessage, PID 17933.Panic Expression !(((void *)0) == pBuff) PANIC_ID_tgt_1594023094280.
/opt/emc/scaleio/sds/bin/sds-3.6.300.107(mosDbg_PanicPrepare+0x13a) [0x93ab8a]
/opt/emc/scaleio/sds/bin/sds-3.6.300.107(spefStorageRegion_FillCompressedMessage+0x2a5) [0x80f625]
/opt/emc/scaleio/sds/bin/sds-3.6.300.107(raidComb_WriteCombRemote+0x168c) [0x75232c]
/opt/emc/scaleio/sds/bin/sds-3.6.300.107() [0x753098]
/opt/emc/scaleio/sds/bin/sds-3.6.300.107() [0x5dd1f6]
/opt/emc/scaleio/sds/bin/sds-3.6.300.107(raidComb_Write+0xf0) [0x5de710]
/opt/emc/scaleio/sds/bin/sds-3.6.300.107(iohComb_WritePrimary+0x405) [0x5f5705]
/opt/emc/scaleio/sds/bin/sds-3.6.300.107(ioh_Write+0x521) [0x5f6411]
/opt/emc/scaleio/sds/bin/sds-3.6.300.107(ioh_NewRequest+0x3085) [0x5fc4a5]
/opt/emc/scaleio/sds/bin/sds-3.6.300.107(contNet_RecvIORequest+0x2c4) [0x601534]

Cause

When migrating a compressed volume, it is possible that the target SDS receives migration data that has been completely trimmed or written with zeros. If this occurs, the SDS may not process the data correctly, which can cause the SDS to restart or panic. This is an issue that can arise during volume migration.

Resolution

Upgrade PowerFlex to v3.6.1 or v4.x and above.

Affected Products

PowerFlex Software

Products

VxFlex Product Family
Article Properties
Article Number: 000210789
Article Type: Solution
Last Modified: 29 جمادى الأولى 1447
Version:  6
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