Skip to main content

Installing SAP Hana using hdblcmweb via SAP Hostagent connection

 The SAP HANA database lifecycle manager (HDBLCM) Web user interface is hosted by the SAP Host Agent, which is installed on the SAP HANA host. When installing or updating the SAP HANA system, as part of the SAP


HANA resident HDBLCM configuration, the SAP HANA system deploys its artifacts on the SAP Host Agent, thus enabling the Web user interface.

All Web user interface actions are always performed in the context of an already installed and registered SAP HANA system. In order to access the SAP HANA database lifecycle manager Web user interface you need to log on as the system administrator user <sid>adm.
The communication between the Web browser and the SAP Host Agent is always done over HTTPS, which requires that the SAP Host Agent has a secure sockets layer (SSL) certificate (PSE) in its security directory.

The backend is provided by the special executable hdblcmweb, which is started automatically by the SAP Host Agent as soon as an action is triggered from the Web user interface and terminates after the action completes

Now we can understand that whenever we access hdblcmweb we indirectly use hostagent.

We have a known error which is discussed in this note

2550407 - hdblcm update_host failed with errors


Symptom

Try to use SAP HANA database lifecycle manager (hdblcm) Web UI from the SAP HANA Studio, the Web UI does not open and you get error: Error occurred while trying to start SAP HANA lifecycle manager
Try to open the Web UI via standalone browser via http at URL http://<hostname>:1128/lmsl/HDBLCM/<SID>/index.html, get a page not found message (404 Not Found)
Followed the troubleshooting steps mentioned in SAP note 2078425 - Troubleshooting note for SAP HANA platform lifecycle management tool hdblcm, after running command:
<sapmnt>/<SID>/hdblcm/hdblcm --action=update_host --components_registration=none
got the following error in the log:
WRN : Deployment of SAP Host Agent configurations failed on host 'xxxxxxxxxx': Detection failed, SOAP-ENV:Server


Cause

Enable the traces of the SAP Host Agent, edit the host profile /usr/sap/hostctrl/exe/host_profile and add the following lines:

hostexec/trace = 3
service/trace = 3

Restart the SAP Host Agent with the following command: /usr/sap/hostctrl/exe/saphostexec -restart

Run the hdblcm --action=update_host --components_registration=none

command again to reproduce the error. 

Check the /usr/sap/hostctrl/work/sapstartsrv.log, you may find the following entries:


 *** ERROR => Unable to open /usr/sap/hostctrl/exe/descriptors.d (13: Permission denied)

 *** ERROR => Could not open directory '/usr/sap/hostctrl/exe/operations.d' (13: Permission denied)

 ***ERROR => Unable to deploy: Unable to access /usr/sap/hostctrl/exe/adapters.d: Permission denied

The filesystem owner settings on the mentioned directories are wrong.Both directories should belong to root:sapsys.
If they belong to root:root, it will not be possible to deploy operations and descriptors properly.


One platform LCM task, which is worth special attention is the update of the SAP HANA system and components. The SAP HANA system updates are always performed by the installation kit SAP HANA database lifecycle manager in the graphical user and command-line interfaces, (and not the SAP HANA resident HDBLCM). This is because the SAP HANA database lifecycle manager, in the graphical user and command-line interfaces, is not forward compatible. Meaning that only the new version of the tool knows how to update an older system.


On the other hand, all scenarios in the Web user interface are handled by the SAP HANA resident HDBLCM, which is part of the system. For this reason, as a first step before even starting the update process, you are required to enter a location of an SAP HANA database installation kit. After detecting the kit, the update Web user interface is loaded from the installation kit and the installation kit SAP HANA database lifecycle manager starts serving as backend until the update process finishes. It is as if you start the SAP HANA database lifecycle manager directly from the installation kit in graphical user or command-line interface.

Resolution
logon as root user, change the ownership of the above mentioned two directories:
chown root:sapsys /usr/sap/hostctrl/exe/operations.d
chown root:sapsys /usr/sap/hostctrl/exe/descriptors.d
chown root:sapsys /usr/sap/hostctrl/exe/adapters.d
Run the following command again to redeploy SAP host agent configuration:
<sapmnt>/<SID>/hdblcm/hdblcm --action=update_host --components_registration=none

Prerequisite for using hdblcm webui

● The SAP HANA studio revision is 120 or higher.

●For Linux:

The system property org.eclipse.swt.browser.XULRunnerPath should be set in hdbstudio.ini to point to the path of XULRunner, for example:-Dorg.eclipse.swt.browser.XULRunnerPath=<path to xulrunner>.

This hdbstudio.ini file is located in the same folder as the executable that is used to start the SAP HANA studio. For Linux, the default location is hana/shared/<SID>/hdbstudio.

The communication port 1129 is open.
Port 1129 is required for the SSL communication with the SAP Host Agent in a standalone browser via HTTPS.

SUSE Linux - Mozilla Firefox with XULRunner 10.0.4 ESR

Newer version of web browser is available

Comments

You might find these interesting

How to properly Start/Stop SAP system through command line ?

Starting/stopping an SAP system is not a critical task, but the method that most of us follow to achieve this is sometimes wrong. A common mistake that most of the SAP admins do is, making use of the 'startsap' and 'stopsap' commands for starting/stopping the system.  These commands got deprecated in 2015 because the scripts were not being maintained anymore and SAP recommends not to use them as many people have faced errors while executing those scripts. For more info and the bugs in scripts, you can check the sap note 809477.  These scripts are not available in kernel version 7.73 and later. So if these are not the correct commands, then how to start/stop the sap system?  In this post, we will see how to do it in the correct way. SAP SYSTEM VS INSTANCE In SAP, an instance is a group of resources such as memory, work processes and so on, usually in support of a single application server or database server with

sapstartsrv is not started or sapcontrol is not working

 What is sapstartsrv ? The SAP start service runs on every computer where an instance of an SAP system is started. It is implemented as a service on Windows, and as a daemon on UNIX. The process is called  sapstartsrv.exe   on Windows, and   sapstartsrv   on UNIX platforms. The SAP start service provides the following functions for monitoring SAP systems, instances, and processes. Starting and stopping Monitoring the runtime state Reading logs, traces, and configuration files Technical information, such as network ports, active sessions, thread lists, etc. These services are provided on SAPControl SOAP Web Service, and used by SAP monitoring tools (SAP Management Console,  SAP NetWeaver  Administrator, etc.). For more understanding use this link : https://help.sap.com/doc/saphelp_nw73ehp1/7.31.19/enUS/b3/903925c34a45e28a2861b59c3c5623/content.htm?no_cache=true How to check if it is working or not ? In case of linux , you can simply ps -ef | grep sapstartsrv In case of windows, you need

ST03N : The chapter for all BASIS Admins

This blog is targeted to BASIS ADMINS Transaction for workload analysis statistical data changed over time are monitored using transaction code ST03 , now ST03N (from SAP R/3 4.6C) . With SAP Web AS 6.4 the transaction ST03 is available again. From time to time ST03 and ST03N has seen many changes but later in SAP NW7.0 ST03N has reworked in detail specially processing time is now shown in separate column. Main Use of ST03N  is to get detailed information on performance of any ABAP based SAP system. Workload monitor analyzes the statistical data originally collected by kernel. You can compare or analyze the performance of a single application server or multiple application server. Using this you start checking from the entire system and finding your way to that one application server and narrowing down to exact issue. By Default :- You see data of current day as default view , you can change the default view. Source of the image : sap-perf.ca Let's discuss the WORKLOAD MONITOR By D

HANA System Replication - Prerequisites & Setup

Hey Folks! Welcome back to Hana high availability blog series. In our last blog we checked out operation & replication modes in hana system replication. If you haven't gone though that blog, you can checkout  this link In this blog we will be talking about the prerequisites of hana replication and it's setup. So let's get started. When we plan to setup hana system replication, we need to make sure that all prerequisite steps have been followed. Let's have a look at these prerequisites. HANA System Replication Prerequisites: Primary & secondary systems should be up & running HDB version of secondary should be greater than or equal to Primary database sever But, for Active/Active(read enabled config), HDB version should be same on both sites. System configuration/ini files should be identical on both sides Replication happe

HANA hdbuserstore

The hdbuserstore (hana secure user store) is a tool which comes as an executable with the SAP Hana Client package. This secure user store allows you to store SAP HANA connection information, including user passwords, securely on clients. With the help of secure store, the client applications can connect to SAP HANA without the user having to enter host name or logon credentials. You can also use the secure store to configure failover support for application servers in a 3-tier scenario (for example, SAP Business Warehouse) by storing a list of all the hosts that the application server can connect to. To access the system using secure store, there are two connect options: (1)key and (2)virtualHostName. key is the hdbuserstore key that you use to connect to SAP HANA, while virtualHostName specifies the virtual host name. This option allows you to change where the hdbuserstore searches for the data and key files. Note

How to resolve Common Error : Standard Template "sap_sm.xls" missing

Hey everyone, putting forward a common error we usually face when we have “ Excel inplace” functionality enabled in our SAP system. This error occurs when validity of the signature of SAP standard templates expired or were incorrectly delivered via support packages. We can reproduce the error by doing as below.. Click on “spreadsheet” icon after any SAP ALV grid view of data is on screen to make this data to export into excel directly from SAP.

Complete Guide : XPI Inspector Tool

Content of this blog :           What is an XPI Inspector Tool ? Why XPI Tool is used ? XPI standard URL How to check XPI Tool version ? How to Install/Update XPI version using TELNET How to Use XPI Tool ? References – SAP Notes What is XPI Inspector tool ?          -    XPI Inspector is a diagnostics web application developed by SAP that collects logs and debug traces from various PI components in a very simple way and is useful for SAP PI consultants, developers, and administrators to get more insights on an issue. Why XPI is used  – 1.  Used to collect traces and logs from Messaging system or XI module. 2. Used to collect the related information to solving the issues or improving the PI or PO systems’ performance. 3. Using XPI Inspector application you will be able to collect a lot of information about your system that will help you to learn about problems in the past, to analyze new and detect such at an early stage. 4. Performs certain number of configuration checks, such as SSL c

ABAP Dumps Analysis

Ever now and then have you heard about ABAP Dumps, We also have a joke everything in temporary in life except ABAP dumps for SAP Consultants. Lets try to understand ABAP dumps from perspective of a SAP BASIS Consultant. Dumps happen when an ABAP program runs and something goes wrong that cannot be handled by the program We have two broad categories of Dumps , In custom program Dumps and SAP provided program Dumps. Dumps that happen in the customer namespace ranges (i.e. own-developed code) or known as Custom Program , can usually be fixed by the ABAP programmer of your team. Dumps that happen in SAP standard code probably need a fix from SAP. You do not have to be an "ABAPer" in order to resolve ABAP dump issues. The common way to deal with them is to look up in ST22 How to correct the error ? Hints are given for the keywords that may be used to search on the note system. Gather Information about the issue  Go to System > Status and Check the Basis SP level as well as info

SAP system migration blog series - part 1: migration overview

Summary : This blog is part 1 of the blog series on SAP system migration. In this blog, we will provide overview about SAP migration, types of migration, their differences and usage scenario. SAP migration overview :   As the Greek philosopher, Heraclitus, said: “change is the only constant.” Same goes within SAP world too, often customer have to change the SAP systems along with its underlying components to meet the changing requirements, be it change from old hardware to new one, changing operating system, database. This change in SAP system components (DB, OS or Hardware) is termed as migration. Before we go into details of migration, let’s understand architecture of a typical SAP system.   An SAP system consist of SAP application instances, running on database (DB), hosted on operating system (OS), provisioned on hardware. Change in any one or more of these underlying components (DB, OS or hardware) warrant us to perform migration. Types of migration:   Broadly, there are two types

Work Process and Memory Management in SAP

Let’s talk about the entire concepts that are related to memory when we talk about SAP Application. Starting with few basic terminologies, Local Memory :  Local process memory, the operating system keeps the two allocation steps transparent. The operating system does the other tasks, such as reserving physical memory, loading and unloading virtual memory into and out of the main memory. Shared Memory :  If several processes are to access the same memory area, the two allocation steps are not transparent. One object is created that represents the physical memory and can be used by various processes. The processes can map the object fully or partially into the address space. The way this is done varies from platform to platform. Memory mapped files, unnamed mapped files, and shared memory are used.  Extended Memory : SAP extended memory is the core of the SAP memory management system. Each SAP work process has a part reserved in its virtual address space for extended memory. You can set