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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 and later
Linux x86-64


 This document provides detailed information on all Linux OS related known issues for Exalogic.




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In this Document
 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 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 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

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