Core Dump of a process in Red Hat Linux 5. Unix Linux Forums.
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But I can not predict when my application stalls? It is not definite? Can you tell me the procedure (step by step) in gcore to take the core dump.
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I have tested the following and it is dumping in running condition. The following commands are executed to take the dump. Ulimit –c (To check the limit of dump file which will be created)In normal system it yields ‘0’. Means no dump file will be created. Ulimit –c unlimited (to make the volume of dump file as unlimited)You should get ‘unlimited’ as output if you again type ‘’ulimit –c’’ command in $ prompt.
PID of WEBFGSERVER in linux system where WEBFGSERVER is running)You will be redirected to gdb prompt. Typed the following in gdb prompt. It will take 4. 5 secs to 1 minute to create the memory dump. When you are redirected to gdb> type the following.
Red Hat Linux 7.3 Release Notes. The xscanimage program has been deprecated and may be removed in a future release of Red Hat Linux. · Hi, does any one have news on when Red Hat ES 5 Releases? I thought it was supposed to come out today?
It will create a file named core. Is there any thing wrong in it.
If not then how the above steps can be used to core dump immediately after the process stalls?
Oracle Linux Release Notes. This document covers the following topics regarding Oracle Linux 5. For the latest updates please refer to the online version of these release notes available. NOTE. An upgrade of Oracle Linux from a beta release is not supported. Further. an in- place upgrade between major versions of Oracle Linux is not supported.
Oracle does not recommend an upgrade from earlier major versions of Oracle. Linux even though anaconda provides an option to do this upgrade. A fresh. installation is strongly recommended rather than a system upgrade between. The following RPMs are modified from the upstream release. All changes are trademark and look/feel related unless otherwise noted below under the specific RPM. The following packages were added upstream for this release (5.
Note: Oracle Linux 5. Unbreakable Enterprise Kernel.
Both Unbreakable Enterprise kernel and Red Hat compatible kernel are installed and the system boots with Unbreakable Enterprise kernel by default. If needed /etc/grub. Red Hat compatible kernel by default. This section covers significant changes in the Red Hat compatible kernel in this release.
This is the Red Hat compatible kernel with critical bug fixes produced by Oracle. The Red Hat Compatible Kernel with Bug Fixes by Oracle must be manually installed. To install this kernel, follow these steps: The Unbreakable Enterprise Kernel Release 2 is Oracle's second major release of its heavily tested and optimized operating system kernel for Oracle Linux 5 and Oracle Linux 6. It is based on the mainline Linux 3. It contains a large number of improvements and new features that have been incorporated into mainline Linux since the first version of the Unbreakable Enterprise Kernel. Please see the initial Oracle Unbreakable Enterprise Kernel Release 2 Release Notes for a detailed description of these changes.
The 2. 6. 3. 9- 3. Note: the actual version number displayed by the kernel and on the RPM packages is 2. This was done to avoid potential breakage of certain low- level utilities of the Oracle Linux distribution (also known as the "plumbing") that potentially can't cope with the new 3. Regular Linux applications are usually not aware or affected by Linux kernel version numbers. The Unbreakable Enterprise Kernel supports a wide range of hardware and devices.
In close cooperation with hardware and storage vendors, several device drivers have been updated by Oracle. Following features included in the Unbreakable Enterprise Kernel Release 2 are still under development, but are already made available for testing/evaluation purposes. Oracle Linux maintains user- space compatibility with Red Hat Enterprise Linux, which is independent of the kernel version running underneath the operating system. Existing applications will continue to run unmodified on Unbreakable Enterprise Kernel Release 2 and no re- certifications are needed for RHEL certified applications. The Oracle Linux team works closely with 3rd party hardware and software vendors to minimize impact on interoperability during releases but in order to introduce new drivers there are instances where changes must be made.
In this release, there are changes to the kernel ABI which requires 3rd party kernel modules on the system be recompiled. Before installing this update, please verify the support status of this release with your application vendor(s). The following Technology Preview features are. Oracle Linux 5 and may not be. These features are not suitable for. However, these features are included to provide the.
Red Hat compatible Kernel with Oracle bug fixes will be updated to standard Red Hat compatible kernel during ISO upgrade. The Oracle Linux ISO has the patched Red Hat compatible kernel but it is not in the iso repodata, therefore if the ISO is used to upgrade, the kernel will be updated to the Red Hat compatible version of the latest release (the non- patched). This is expected behavior. Red Hat compatible Kernel will be updated to standard Red Hat compatible kernel with Oracle bug fixes during ULN upgrade. If a 5. 8 system running the Red Hat compatible kernel registers to the 5. ULN channel, the kernel will be updated to the Red Hat compatible with Oracle bug fixes version of the latest release.
This is expected behavior. Error: "qemud. Staretup: 1. Unable to create cgroup for driver: No such device or address" Use the following steps to workaround this error. Unable to mount btrfs on Oracle Linux 5, error: mount /dev/sda /mnt.
To correct, add "- t btrfs" to the mount statement or add btrfs in /etc/filesystems. On Oracle Linux 5, the "cp" command did not support reflinks on btrfs.
Support for reflink was added to btrfs- prog and can be enabled using "- -reflink" as an option on "cp"YUM command error occurs after system is removed from ULNAfter removing a system from the list in ULN and running 'yum update' on the server console, the following error is displayed. Attribute. Error: 'module' object has no attribute 'Rhn.
Server. Exception'. To work around this issue remove /etc/sysconfig/rhn/systemid and run 'yum update' againdmsg error: "rtc_cmos: probe of rtc_cmos failed with error - 1. Error: Driver 'pcspkr' is already registered, aborting..
This is a known issue that is seen with Oracle Linux 5 3. UDEVD to be updated to use oom_score_adj to disable OOM on 2. UEK2. This change will set com_score_adj, if available otherwise if this fails, it will fall back to the old com_adj. Installation completes successfully but grub. This occurs when trying to instal the bootloader to a cciss device.
To correct this, edit the drive order by moving /dev/cciss/c. Missing open. IB drivers (sdp/ulp) for Infiniband in UEK (R1/R2)When attempting to load the open. IB service the error "Loading Open. IB kernel modules: FATAL: Module ib_sdp not found" is displayed.
This is an artifact of the ib_sdp driver from Open. IB not being included in the UEK. If you are using Open. IB, you should use the Red Hat compatible kernel. Service TUX failed to start on Oracle Linux systems running the UEKWhen attempting to start tux service (service tux start) the system reports multiple errors for "No such file or directory" and ends with "TUX not implemented in this kernel". TUX is not shipped as part of the UEK and this is expected behavior. After running yum update there are multiple errors in the yumupdate.
The error messages are generated due to bad symbolic links in the Red Hat compatible kernel and are considered harmless. HVM with PV Drivers Upgrade Issue: Cannot Update Bootloader configuration. When upgrading a VM using the HVM with PV Drivers Domain type on Oracle Enterprise Linux 5.
ISO media, the option to upgrade the boot loader configuration may not be available. This is due to a difference in the way the kernel detects the disk devices that prevents it from detecting the existing configuration. There are two ways to work around the problem. Use yum to upgrade the systems to 5. ISO. - Choose the "create new bootloader" option. After the upgrade, old kernel entries that refer to removed kernel packages may remain in the grub. Make sure to boot to the 5.
No networking after upgrading an Oracle Linux 5 HVM guest on Oracle VM 2. Upgrading an existing Oracle Linux 5 Update 6 or Update 7 guest which is running in HVM mode on. Oracle VM 2. 2. 2 may result in the network interface(s) being disabled after the reboot post- upgrade. To resolve this. issue, ensure that the network interfaces are set to "paravirtual" in Oracle VM Manager.
Alternatively, to maintain the emulated devices inside the guest, add xen_emul_unplug=never to the kernel boot. No networking after upgrading an Oracle Linux 5 HVM with PV Drivers guest on Oracle VM 2. Upgrading an existing Oracle Linux 5 Update 6 or Update 7 guest which is running in HVM with PV Drivers mode on. Oracle VM 2. 2. 2 or 3. To resolve this. issue, rename the /etc/sysconfig/network- scripts/ifcfg- eth.
Warnings appear in dmesg on first boot. After an initial install of Oracle Linux 5. This warning can be safely ignored.
New multipath settings requires changes to /etc/multipath. Oracle Linux 5. 9 includes a new version of device- mapper- multipath. This new version requires manual changes to the /etc/multipath. In the multipath.
Valid settings for prio are. Multipath failure causes flush of all multipath devices. In some multipath failure cases, the multipath maps can get flushed when all.
This has been reported with 2. UEK kernels using. Net. App LUNs, but not when running 2. LUNs. Error inserting cxgb. Chelsio T3 Network Controller will fail. Use following workaround steps to fix the issue. Remove cxgb. 3i dependent module from memory if any loaded , i.
Uninstall ofa package. Load cxgb. 3i module. Slow performance on 1. Gb Ethernet Interfaces.
The default networking tuning parameters may be too low for some 1. Gb Ethernet interface drivers. If you are experiencing less than expected network performance, change the following NIC parameters. On 3. 2- bit Oracle Linux systems, you may see the following warning in dmesg.
This is only a warning and can be safely ignored. TCO_wdt warning in dmesg. Some server hardware may not support the Intel TCO watchdog drivers. The following warning may be seen in dmesg. TCO_vendor_support: vendor- support=0. TCO_wdt: Intel TCO Watch. Dog Timer Driver v.
TCO_wdt: failed to reset NO_REBOOT flag, reboot disabled by hardware. TCO_wdt: No card detected.
FWH not detected. To disable this TCO Watch.
Dog Timer Driver and suppress this warning at boot time add the line "blacklist i. TCO_wdt" to. /etc/modprobe. Unbreakable Enterprise Kernel firmware must be manually installed prior to upgrade. Due to a change in the way firmware is loaded between the Red Hat Compatible Kernel and the Oracle Unbreakable Enterprise Kernel, you may need to manually install the correct UEK kernel firmware package if you want to boot a previous kernel version after upgrading to Oracle Linux 5.
For example, to install the firmware for kernel- uek- 2. RPM package from the Unbreakable Linux Network and run the following command.