Exalogic Linux Physical Compute Nodes Known Issues
(Doc ID 2222217.1)
Last updated on MAY 29, 2022
Applies to:
Oracle Exalogic Elastic Cloud Software - Version 2.0.0.0.0 and laterLinux x86-64
Purpose
This document provides detailed information on all Linux OS related known issues for Exalogic.
Scope
Details
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In this Document
| Purpose |
| Scope |
| Details |
| Linux Panic, Hang & Crash Issues |
| ILOM hangs when Compute Node hangs in Exalogic X3-2 and X4-2 racks |
| Exalogic Compute Nodes Intermittently Crash and Reboot Due to a Memory Leak in Size-192 Allocations Within The Kernel Slab Area |
| Exalogic Linux Physical Compute Nodes Crashing With "kernel: WARNING: at lib/list_debug.c:47 __list_del_entry+0x63/0xd0()" Messages |
| Exalogic Physical Compute Node Hang With "[region_chg+0x7b/0xe0]" Error |
| Exalogic Compute Node Running Oracle Linux 6 Crash Issue Due to flush_tlb_others_ipi Causing Soft CPU Lockups |
| Force/Abrupt shutdown (SIGKILL) Of Coherence JVMs using IMB Protocol On Exalogic Linux Compute Nodes may lead to Kernel Panic |
| Compute Nodes facing Linux Kernel Panic at "find_busiest_group" trace |
| NFSv4: Linux client treats NFS4ERR_GRACE as a permanent error and causing a renew storm |
| Linux Performance Issues |
| EOIB Bond Does Not Come UP After Compute Node Reboot In Exalogic Linux Physical 2.0.6.2.0 Rack Running With OL 6.5 |
| Exalogic Compute Node File System Full Due To "SSH" Connections From "orarom" User |
| Exalogic Compute Node IB Network Going Down Frequently With Mlx4_ib_event MLX4_DEV_EVENT_PORT_DOWN Error Messages |
| Exalogic Compute Node Exhibits Slow Write Performance when Testing with the dd Command |
| Stability & Performance Issues on Compute Nodes & vServers running Linux after uptime of more than 208 days |
| Linux Administration Issues |
| Core files created on NFSv4 mounts on Exalogic are always of Zero bytes size |
| Leap Second Known Issue |
| Patch/Fix-Up Procedure For Turkey Day Light Savings Time 2015 Postponement By Two Weeks |
| OID And EM Agent Instances Unable To Start After Upgrading To April 2015 PSU (EECS 2.0.6.2.1) Or Later Versions |
| Exalogic: Turkey Daylight Saving Time After Change from EET (Eastern Europe) to GMT+3 |
| Unable to shutdown compute node when NFS has background processes |
| April 2012 PSU patch 13569004 changing the root permissions causing sendmail to break |
| Other Issues |
| Login To Exalogic Compute Node Fails After Changing limits.conf File |
| "sshd" Service Not Working On Exalogic Compute Node & SSH To Compute Nodes Failing With "Connection refused" Message |
| Exalogic Linux Physical: "PPM exceeds tolerance 500 PPM" NTPD Error Seen On Compute Nodes |
| Exalogic: OSWatcher Heartbeat File Growing In Size With "No such file or directory" Errors |
| Exalogic: Machine Exception Log (/var/log/mcelog) Grows Rapidly When Hardware Fault Is Present Filling Root Filesystem |
| Exalogic Linux Physical Compute Nodes IB Port Gets Removed With Coherence Cluster In IMB mode |
| Exalogic: VNIC 10gb Bond Network Ethernet Link Failover Detection |
| Exalogic Physical: Newly Created VNICs On the Replaced Infiniband Switch Are In WAIT-IOA State |
| Exalogic X6-2: Compute Nodes ILOM Configuration Lost When Patching Compute Node ILOMs During PSU Upgrade To January 2018 Or Later PSUs |
| References |