PowerFlex：SDS 进程在功能MosAsyncIO_ReqAccounting持续崩溃

Summary: 在 PowerFlex 组件的手动或 PFMP SVM 转换和手动升级期间，如果 rep_tgt.txt 文件未正确创建，SDS 可能会持续失败。

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Symptoms

SDS 进程持续崩溃，并显示以下堆栈跟踪：

2024/05/27 08:11:10.051615 Panic in file /data/build/workspace/ScaleIO-Common-Job/src/mos/usr/linux/mos_async_io.c, line 1107, function mosAsyncIO_ReqAccounting, PID 21157.Panic Expression pOsReq->accounting.totalLenSubmittedBytes == pReq->bytesIO
/opt/emc/scaleio/sds/bin/sds-4.5.2000.135(mosDbg_PanicPrepare+0xf4) [0x936f74]
/opt/emc/scaleio/sds/bin/sds-4.5.2000.135(mosAsyncIO_ReqAccounting+0x26b) [0x95398b]
/opt/emc/scaleio/sds/bin/sds-4.5.2000.135() [0x953b4e]
/opt/emc/scaleio/sds/bin/sds-4.5.2000.135(mosAsyncIO_Reaper+0xab8) [0x959dc8]
/opt/emc/scaleio/sds/bin/sds-4.5.2000.135(mosOsThrd_StartFunc+0x15a) [0x94056a]
/lib64/libpthread.so.0(+0xa6ea) [0x7f0629c166ea]
[(nil)]

 

在 SDS 崩溃之前，SDS 跟踪日志指示从 /opt/emc/scaleio/sds/cfg/rep_tgt.txt 读取时出现问题：

2024/05/27 08:10:36.501247 LOW:7fa41442ddb0:mos_ReadParamFromSysPath:01442: ERROR: Failed to stat sys file /sys/dev/block/0:55/partition, errno: 2
2024/05/27 08:10:36.501253 MED:7fa41442ddb0:mos_GetDevMaxIoSizeBytesFromFD:01565: Could not read parameter for file 28 (path /sys/dev/block/0:55/partition), assuming 256.
2024/05/27 08:10:36.501260 MED:7fa41442ddb0:mosAsyncIO_OpenFileEx:00463: Opened file /opt/emc/scaleio/sds/cfg/rep_tgt.txt (fd 28), maxInflight 8, maxIoSize 256, ptr 0x7fa42c14a450

 

受影响的产品：PowerFlex 3.x 和 4.x

Cause

SDS 在尝试访问 rep_tgt.txt 文件时出现问题。

 

Resolution

如果 rep_tgt.txt Does Not Exist：

      1. 从主 MDM 检索所需的 ID：

        • 获取MDM_ID：
          scli --query_all | grep ID | head -n1
        • 获取SDS_ID：（请参阅相关 SDS）
          scli --query_all_sds

      2. 创建 rep_tgt.txt 文件，其中包含检索到的 ID。替换上述输出中的 MDM_ID 和 SDS_ID

        echo -n "mdmId=<MDM_ID>,tgtId=<SDS_ID>" > /opt/emc/scaleio/sds/cfg/rep_tgt.txt truncate -s 4096 /opt/emc/scaleio/sds/cfg/rep_tgt.txt

        示例：

        echo -n "mdmId=e7db67b7c2e2190f,tgtId=2514c01a00000003" > /opt/emc/scaleio/sds/cfg/rep_tgt.txt truncate -s 4096 /opt/emc/scaleio/sds/cfg/rep_tgt.txt

      3. 启动 SDS 守护程序：

        /opt/emc/scaleio/sds/bin/create_service.sh

         

如果 rep_tgt.txt 存在：

    1. 验证文件内是否包含正确的 MDM ID 和 SDS ID。

      cat /opt/emc/scaleio/sds/cfg/rep_tgt.txt

       

    2. 检查文件大小（必须为 4096 字节）：

      ls -l /opt/emc/scaleio/sds/cfg/rep_tgt.txt

       

    3. 如果文件小于 4096 字节：

      1. 备份现有文件：
        cp /opt/emc/scaleio/sds/cfg/rep_tgt.txt /opt/emc/scaleio/sds/cfg/rep_tgt.txt.bak
      2. 调整文件大小：

         

        truncate -s 4096 /opt/emc/scaleio/sds/cfg/rep_tgt.txt

         

      3. 验证新文件大小
         
    4. 启动 SDS 守护程序：
      /opt/emc/scaleio/sds/bin/create_service.sh


如果遵循解决方法后仍然发生 SDS 崩溃，请联系戴尔支持 以获得进一步的帮助。

Affected Products

PowerFlex Software

Products

PowerFlex rack, PowerFlex Appliance
Article Properties
Article Number: 000226538
Article Type: Solution
Last Modified: 11 Jun 2025
Version:  3
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