Environment open flags and multithreading

Do I actually need to create an environment explicitly if I want to read only from a database in a multithreaded program (no other process, no write operations)? I don't need to use DB_INIT_LOCK as there is no thread writing to the database. And I don't need to use DB_INIT_MPOOL as there is no other process using the very same database. As the database is read-only the open flags DB_INIT_LOG, DB_INIT_TXN and DB_RECOVER don't provide any benefit either. Is this all correct? I don't need to use DB_THREAD either (which I found in the documentation of DbEnv)?
Boris

LaurenFoutz wrote:
You are correct. Using XmlManager without an environment will automatically create an environment that can support multithreaded access (but not multiprocess). So for your multithreaded single-process read only application an XmlManager without an explicit environment should be sufficient.I started to test some code. Unfortunately it always crashs if I use more than one thread. I get different error messages when it crashs - here are a few:
{font:Courier}BDB XML: page 0: illegal page type or format
BDB XML: PANIC: Invalid argument
BDB XML: assert failure: ..\..\db-4.6.21\db\db_cam.c/92: "F_ISSET(dbc, DBC_ACTIVE)"
BDB XML: PANIC: fatal region error detected; run recovery{font}
{font:Courier}BDB XML: assert failure: ..\..\db-4.6.21\mp\mp_alloc.c/564: "(bhp == first_bhp)? priority == last_priority : priority >= last_priority"{font}
{font:Courier}BDB XML: test.bdbxml: more pages returned than retrieved
BDB XML: PANIC: Permission denied
BDB XML: PANIC: fatal region error detected; run recovery{font}
I still have to debug the code to find out if I am doing anything wrong. But are there any known issues that it makes sense if I try to use some flags and maybe create the environment explicitly? Currently I only use DB_RDONLY to open the container.
Boris
PS: I just saw that the API reference contains a flag DB_THREAD. If I open the container with DB_THREAD though I get another error message:
{font:Courier}BDB XML: environment not created using DB_THREAD{font}
I'm a bit confused now: Either DB_THREAD is not required for thread-safe access or an environment must be created explicitly in order to use DB_THREAD?
Edited by: Boris Schaeling on Jul 31, 2009 2:11 AM

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Environment DB_PRIVATE flag

Hello
I've got a question: Is it possible to open several process-private environments that would share their regions, i.e. would have the same effect as opening the environment in some directory but would not create any files?
And one more question: Do I have to enable locking if I have concurrent accesses to the environment, but not to the underlying databases. I mean, is access to the memory pool and other environment regions already synchronized, without specifying DB_INIT_LOCK?
Thanks, Giorgi.
Edited by: _Hitman47 on Dec 10, 2010 1:53 AM

Yeah, I've read documentation. My question was following: Can I open several private environment handles per process (one per thread) which would use the same memory pool? I can make a private environment handle thread safe by specifying DB_THREAD flag and use that single handle in all threads, but performance overhead of using DB_THREAD flag is quite big - about 10%.
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In my application, each thread opens a set of databases, do some operations on them and close them. My application guarantees that no database will be opened simultaneously by more than one thread at one moment of time.
The problems begin when one thread opens a database in its own private environment, which has been previously opened(and closed!) by another thread. It seems that closing database in environment still leaves some pages unflushed to hard disk, even after calling DB_ENV->memp_sync() function. So when another thread tries to load that database, ot is not consistent and errors start to appear. If I use one single private environment handle for all threads, or open nonprivate(file-backed) environment handles in each thread, the application works as it should.
I hope I expressed myself clear enough.
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hi
i know the report FBL5N is use DDF LDB and the report work flow is BSID->BKFP->BSEG
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Open items and Cleared items stand for a field flag in these table (BSID,BKFP,BSEG )? if true the field is?
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Hi,
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In FI first the document is Open (when it is posted) so the entry is made in table BSID. Once the document is cleared, it will move from BSID to BSAD. And for Cleared item you will see Clearing Document no and Clearing date values updated (these are blank when the item is open).
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Hope this helps.
ashish
Message was edited by:
Ashish Gundawar

Transferring open items and balances

Hello!
Do anyone know if there are SAP tools for the transfer of Account Receivables (AR), Account Payables (AP) open items and General Ledger (GL) balances from old SAP environment 4.6C to newer SAP environment 6.0?
What should be considered when doing this procedure; what tasks should be done in source client, what tasks should be done in target client?

Hi,
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Assign points
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I started getting this exception (stack trace below) after updating to 4.1.6 and eventually to 4.1.7 as well
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Any idea what could be the problem?
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Javier,
I'll explain what sequence of events can make this exception happen, and perhaps you can figure out why this occurs in your application.
The JE log files hold different kind of log entries, one of which is a type called the environment root. The root holds metadata about the environment as a whole, and JE needs to find the latest version of the root every time an environment is recovered (that is, re-opened). There should always be at least one version in the log.
When an environment is created, the first version of the root is written to the log almost immediately, and the log is checkpointed. The only way we anticipate seeing this particular error is if the environment creation was interrupted, after that first 00000000.jdb file was created, and before the root was written out, which is a pretty small window. This would occur before the environment constructor had returned.
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Open Directory and Mobile Home Folders

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Thanks for the info, by now i will look into that little utility that is very helpful (console!)
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How to use url to open report and refresh report's data,but the report's toolbar haven't "refresh data" button

Post Author: madbird
CA Forum: WebIntelligence Reporting
HI,
scenario is
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regards

Post Author: madbird
CA Forum: WebIntelligence Reporting
Thank you for your attention, amr_foci .
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Environment Open very slow

Using 2.5.3.21 with .net (c#)
I create a new environment with a few databases. The first time I open the environment (before committing any transactions), it opens instantly. However as soon as I insert any data (even just one byte), it takes about 2 minutes to open.
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Can�t open array and object manager

Hello,
i�ve done a fresh install of SGD 4 on Fedora Core 3.
Here I am not able to open array and object manager. I see them running in
the webtop but get no display.
I get the following logs:
in wm_errors: X connection to unix:10.0 broken (explicit kill or server
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X connection to unix:10.0 broken (explicit kill or server shutdown).
X connection to unix:10.0 broken (explicit kill or server shutdown).
X connection to unix:10.0 broken (explicit kill or server shutdown).
X connection to unix:10.0 broken (explicit kill or server shutdown).
X connection to unix:12.0 broken (explicit kill or server shutdown).
X connection to unix:10.0 broken (explicit kill or server shutdown).
..skipping...
X connection to unix:10.0 broken (explicit kill or server shutdown).
X connection to unix:10.0 broken (explicit kill or server shutdown).
X connection to unix:10.0 broken (explicit kill or server shutdown).
X connection to unix:10.0 broken (explicit kill or server shutdown).
X connection to unix:10.0 broken (explicit kill or server shutdown).
X connection to unix:10.0 broken (explicit kill or server shutdown).
X connection to unix:12.0 broken (explicit kill or server shutdown).
X connection to unix:10.0 broken (explicit kill or server shutdown).
~
and in error.log
2005/03/01 18:31:54.951 (pid 20049) pem/circuit #0
Tarantella Secure Global Desktop Enterprise Edition(4.0) ERROR:
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descriptor.
The current operation has failed.
If persistent, restart the server.
Restarting the server doesn�t help.
I�ve also set the xscecurity flag to 0.
This all works fine with Fedora Core 2
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Thanks a lot

Hi Matthias,
I had similar problems with (local) X apps.
via ssh, and I mean they arose with tta vers.
3.42. The problem seems to appear, because
both tta and ssh (with X forwarding) are
using a X-display range from :10 upward.
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(for exsample) in sshd_config.
Then tta still uses displays :10, :11, ...
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(assuming that 90 X/RDP emulator-session are enough in this installation!)
Don't forget to send a SIGHUP to the master
sshd after changing sshd_config, telling
'him' to re-read it's config-file.
One can verify the effect, by calling
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Kind regards,
Tankred
Matthias wrote:
Hello,
not all login authorities are disabled. I have only NT auth. enabled. This
works fine in EE 3.40 on RH 9 and on SGD4.0 on Fedora Core 2. But seems
not to run on Fedora Core 3.
Matthias
Carmelo wrote:
Mattias,>>
>
http://www.tarantella.com/support/documentation/sgd/ee/4.0/help/en-us/base/indepth/disabled_all_login_authorities.html
Regards,
Matthias wrote:
I think I�ve fixed it.
I just edited ssh_conf and enabled X11forwarding and it works for me.
But now I have changed the login authority only to NT auth. and I am no
longer able to log in to tarantella....
Matthias wrote:
Hello,
i�ve done a fresh install of SGD 4 on Fedora Core 3.
Here I am not able to open array and object manager. I see them running
in
the webtop but get no display.
I get the following logs:
in wm_errors: X connection to unix:10.0 broken (explicit kill or server
shutdown).
X connection to unix:10.0 broken (explicit kill or server shutdown).
X connection to unix:10.0 broken (explicit kill or server shutdown).
X connection to unix:10.0 broken (explicit kill or server shutdown).
X connection to unix:10.0 broken (explicit kill or server shutdown).
X connection to unix:10.0 broken (explicit kill or server shutdown).
X connection to unix:12.0 broken (explicit kill or server shutdown).
X connection to unix:10.0 broken (explicit kill or server shutdown).
...skipping...
X connection to unix:10.0 broken (explicit kill or server shutdown).
X connection to unix:10.0 broken (explicit kill or server shutdown).
X connection to unix:10.0 broken (explicit kill or server shutdown).
X connection to unix:10.0 broken (explicit kill or server shutdown).
X connection to unix:10.0 broken (explicit kill or server shutdown).
X connection to unix:10.0 broken (explicit kill or server shutdown).
X connection to unix:12.0 broken (explicit kill or server shutdown).
X connection to unix:10.0 broken (explicit kill or server shutdown).
~
and in error.log
2005/03/01 18:31:54.951 (pid 20049) pem/circuit #0
Tarantella Secure Global Desktop Enterprise Edition(4.0) ERROR:
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descriptor.
The current operation has failed.
If persistent, restart the server.
Restarting the server doesn�t help.
I�ve also set the xscecurity flag to 0.
This all works fine with Fedora Core 2
Anyone any Idea?
Thanks a lot

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Dear Experts,
I am unable to open ESR and IB in the PI portal.
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The actual error is "JNLP file truncated after 10k".
Exception
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at com.sun.deploy.cache.ResourceProviderImpl.getResource(Unknown Source)
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at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Console
#### Java Web Start Error:
#### Unable to load resource: http://XXXXXXXXXXXX:50000/dir/directory/com.sap.xpi.ibdir.client.jar
Versions
PI version      - 7.1
IE version      - 10
JRE version   - 7 update 60 (32 bit)
Terminal OS - Windows 7 (64 bit)
Server OS      - Unix
Resolution Steps Tried
I have tried Java versions Java 1.6 update 45, Java 1.6 update 35, Java 1.6 update 21 but none of them have worked.
I have tried setting the JAVA_HOME environment variable but it has not helped.
I have tried deleting the temporary internet files, clearing the browser cache memory, clearing the Java cache memory but none of them worked.
I have tried selecting 'Direct Connection' in JAVA Control Panel -> Network Setting
Any help will be much appreciated.
Thanks in advance.

Troubleshooting PI ESR and Integration Builder Logon Issues - Process Integration - SCN Wiki
Try restoring the archives and see if that helps..
-> Administration
-> Repository/Directory (tab)
-> Java Web Start Administration
-> Restore Archives and Generate New Signature

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Hi,
I have a problem........I use OS 10.3.9 on my I-Book.......Recently when I start my computer the classic environment opens up........I have not set it up to do that.......I've searched to see what application might be opening that requires classic but have had no luck. I think now that the opening of classic environment is interfering with my wireless....
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Sharon

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I am facing an error when i try to post a query on the exchange forum .Below is the error message .
Error message : your post has been flagged and it is currently under addtional verification
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Thanks & Regards S.Nithyanandham

Hi Richard ,
Please find the below content which i have tried to post.Please help me if anything wrong in the content so that i can change it and repose the content again.
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Content:-
Hi ,
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Why can not I open WinRAR and WinZIP via MS Web Folder?
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modelone,
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