DLm0642E: Internal Error: cannot get buffer from DevBuf pool: delay (running 5.4.x)
Resumen: Numerous DLm0642E messages during DLm ERASE activity at DLm code level 5.4.0.0 may cause threads to stop responding, requiring a restart of the Virtuent application. Issue is fixed in DLm 5.4.0.1 and later code. ...
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Síntomas
Seen in btilog:
09/15/2021 11:50:54 vte1 VT: DLm0501I: Volume F18852 (/tapelibEPPROD/15_SNAP1/~F18852) erased (without truncation)
09/15/2021 11:50:54 vte1 VT: DLm0501I: Volume ED7900 (/tapelibEPPROD/10_SNAP1/~ED7900) erased (without truncation)
09/15/2021 11:50:54 vte1 VT: DLm0642E: Internal Error: cannot get buffer from DevBuf pool: delay
09/15/2021 11:50:54 vte1 VT: DLm0501I: Volume E02399 (/tapelibEPPROD/01_SNAP1/~E02399) erased (without truncation)
09/15/2021 11:50:54 vte1 VT: DLm0501I: Volume J27319 (/tapelibEPPROD/12_SNAP1/~J27319) erased (without truncation)
09/15/2021 11:50:54 vte1 VT: DLm0642E: Internal Error: cannot get buffer from DevBuf pool: delay
09/15/2021 11:50:54 vte1 VT: DLm0642E: Internal Error: cannot get buffer from DevBuf pool: delay
09/15/2021 11:50:54 vte1 VT: DLm0642E: Internal Error: cannot get buffer from DevBuf pool: delay
09/15/2021 11:50:54 vte1 VT: DLm0642E: Internal Error: cannot get buffer from DevBuf pool: delay
09/15/2021 11:50:54 vte1 VT: DLm0642E: Internal Error: cannot get buffer from DevBuf pool: delay
09/15/2021 11:50:55 vte1 VT: DLm0642E: Internal Error: cannot get buffer from DevBuf pool: delay
09/15/2021 11:50:55 vte1 VT: DLm0642E: Internal Error: cannot get buffer from DevBuf pool: delay
09/15/2021 11:50:55 vte1 VT: DLm0642E: Internal Error: cannot get buffer from DevBuf pool: delay
10/02/2021 05:53:17 vte1 VT: DLm0899I: Tapelib /tapelibNBDEV/01 thread has been in state: 01009230 for 619 seconds
10/02/2021 05:53:17 vte1 VT: DLm0899I: Tapelib /tapelibNBDEV/02 thread has been in state: 01009230 for 629 seconds
10/02/2021 05:57:17 vte1 VT: DLm0899I: Device 8108 has been in state: 4D10200D for 611 seconds
10/02/2021 06:00:31 vte1 VT: DLm0207W: Device 8023 bypassing stalled filesystem /tapelibNBDEV/01 (stalled for 1054 seconds)(build list)(01009230)
10/02/2021 06:00:31 vte1 VT: DLm0207W: Device 8023 bypassing stalled filesystem /tapelibNBDEV/02 (stalled for 1064 seconds)(build list)(01009230)
09/15/2021 11:50:54 vte1 VT: DLm0501I: Volume ED7900 (/tapelibEPPROD/10_SNAP1/~ED7900) erased (without truncation)
09/15/2021 11:50:54 vte1 VT: DLm0642E: Internal Error: cannot get buffer from DevBuf pool: delay
09/15/2021 11:50:54 vte1 VT: DLm0501I: Volume E02399 (/tapelibEPPROD/01_SNAP1/~E02399) erased (without truncation)
09/15/2021 11:50:54 vte1 VT: DLm0501I: Volume J27319 (/tapelibEPPROD/12_SNAP1/~J27319) erased (without truncation)
09/15/2021 11:50:54 vte1 VT: DLm0642E: Internal Error: cannot get buffer from DevBuf pool: delay
09/15/2021 11:50:54 vte1 VT: DLm0642E: Internal Error: cannot get buffer from DevBuf pool: delay
09/15/2021 11:50:54 vte1 VT: DLm0642E: Internal Error: cannot get buffer from DevBuf pool: delay
09/15/2021 11:50:54 vte1 VT: DLm0642E: Internal Error: cannot get buffer from DevBuf pool: delay
09/15/2021 11:50:54 vte1 VT: DLm0642E: Internal Error: cannot get buffer from DevBuf pool: delay
09/15/2021 11:50:55 vte1 VT: DLm0642E: Internal Error: cannot get buffer from DevBuf pool: delay
09/15/2021 11:50:55 vte1 VT: DLm0642E: Internal Error: cannot get buffer from DevBuf pool: delay
09/15/2021 11:50:55 vte1 VT: DLm0642E: Internal Error: cannot get buffer from DevBuf pool: delay
10/02/2021 05:53:17 vte1 VT: DLm0899I: Tapelib /tapelibNBDEV/01 thread has been in state: 01009230 for 619 seconds
10/02/2021 05:53:17 vte1 VT: DLm0899I: Tapelib /tapelibNBDEV/02 thread has been in state: 01009230 for 629 seconds
10/02/2021 05:57:17 vte1 VT: DLm0899I: Device 8108 has been in state: 4D10200D for 611 seconds
10/02/2021 06:00:31 vte1 VT: DLm0207W: Device 8023 bypassing stalled filesystem /tapelibNBDEV/01 (stalled for 1054 seconds)(build list)(01009230)
10/02/2021 06:00:31 vte1 VT: DLm0207W: Device 8023 bypassing stalled filesystem /tapelibNBDEV/02 (stalled for 1064 seconds)(build list)(01009230)
Causa
A code issue was introduced in DLm 5.4.0.0 release which may cause a delay with device buffer release after use during scratching or ERASE processing.
This is a buffer starvation issue where the buffer pool gets depleted during heavy scratching or erasing, which causes cascading delays when other threads trying to get a buffer have to wait.
This is a buffer starvation issue where the buffer pool gets depleted during heavy scratching or erasing, which causes cascading delays when other threads trying to get a buffer have to wait.
Resolución
Customer should take immediate remediation by restarting the Virtuent application, or rebooting the VTE.
This issue is addressed in DLm 5.4.0.1 and later code.
This issue is addressed in DLm 5.4.0.1 and later code.
Productos afectados
Disk Library for mainframe DLm2500, Disk Library for mainframe DLm8500Propiedades del artículo
Número del artículo: 000191670
Tipo de artículo: Solution
Última modificación: 21 oct 2025
Versión: 8
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