DLm0642E：内部错误：无法从 DevBuf 池获取缓冲区：延迟（运行 5.4.x）
Summary: DLm 代码级别 5.4.0.0 的 DLm 擦除活动期间的大量 DLm0642E 消息可能会导致线程停止响应，需要重新启动 Virtuent 应用程序。 问题已在 DLm 5.4.0.1 及更高版本代码中得到修复。
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Symptoms
btilog 中显示：
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)
Cause
DLm 5.4.0.0 版中引入了一个代码问题，可能会导致在暂存或擦除处理过程中出现设备缓冲区释放延迟。
这是一个缓冲区匮乏问题，缓冲池在繁重的暂存或擦除工作负载期间耗尽，尝试获取缓冲区的其他线程不得不等待，从而导致级联延迟。
这是一个缓冲区匮乏问题，缓冲池在繁重的暂存或擦除工作负载期间耗尽，尝试获取缓冲区的其他线程不得不等待，从而导致级联延迟。
Resolution
客户应通过重新启动 Virtuent 应用程序或重新启动 VTE 来立即采取修正措施。
此问题已在 DLm 5.4.0.1 及更高版本代码中得到解决。
此问题已在 DLm 5.4.0.1 及更高版本代码中得到解决。
Affected Products
Disk Library for mainframe DLm2500, Disk Library for mainframe DLm8500Article Properties
Article Number: 000191670
Article Type: Solution
Last Modified: 21 Oct 2025
Version: 8
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