SecurityException with Helper.getMBeanHome()

Hello,
I used the Helper class to get the MBeanServer. But when I run the following piece of code
public final void donttestMultipleGetMBeanServer() {
    MBeanHome home = Helper.getMBeanHome("weblogic", "weblogic", "t3://localhost:7001", "DevDom");
    MBeanServer server1 = home.getMBeanServer();
    home = Helper.getMBeanHome("weblogic", "weblogic", "t3://otherhost:9001", "OtherDom");
    MBeanServer server2 = home.getMBeanServer();
}I get the following exception:
java.lang.SecurityException: [Security:090398]Invalid Subject: weblogic
     at weblogic.rjvm.BasicOutboundRequest.sendReceive(BasicOutboundRequest.java:108)
     at weblogic.rmi.internal.BasicRemoteRef.invoke(BasicRemoteRef.java:164)
     at weblogic.management.internal.MBeanHomeImpl_816_WLStub.getMBeanServer(Unknown Source)
         ...When I don't call the Helper.getMBeanHome() twice it works correct - either with the localhost statement and also with the otherhost statement. It crashes only for the second call when I call the getMBeanServer() method. Any hints what's wrong with this code?
regards
Oliver

for security reason, applet can't do io unless your change the policy file, and grant the permssion to applet.

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·         get trace, code and other information for given PE case
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·         Check all mandatory parameters/bind variables are directly mapped to index columns of large transaction tables without any functions
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·         Is Oracle Cost Based Optimizer using right Driving table for given SQL ?
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1) Use Bulk Processing feature BULK COLLECT with LIMIT and FOR ALL for DML instead of row by row processing
2) Use Data Caching Technique/Options to cache static data
3) Use Pipe Line Table Functions whenever possible
4) Use Global Temporary Table, Materialized view to process complex records
5) Try avoiding multiple network trips for every row between two database using dblink, Use Global temporary table or set operator to reduce network trip
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7) Understand Oracle's Cost based Optimizer and Tune most expensive SQL queries with help of Explain plan
8) Follow Oracle PL/SQL Best Practices
9) Review tables and their indexes being used in the SQL queries and avoid unnecessary Table scanning
10) Avoid costly Full Table Scan on Big Transaction tables with Huge data volume,
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13) Use Oracle hint to guide Oracle Cost based optimizer to choose best plan for your custom queries
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I understand you were trying to post something helpful to people, but sorry, this list is appalling.
1) Use Bulk Processing feature BULK COLLECT with LIMIT and FOR ALL for DML instead of row by row processing
No, use pure SQL.
2) Use Data Caching Technique/Options to cache static data
No, use pure SQL, and the database and operating system will handle caching.
3) Use Pipe Line Table Functions whenever possible
No, use pure SQL
4) Use Global Temporary Table, Materialized view to process complex records
No, use pure SQL
5) Try avoiding multiple network trips for every row between two database using dblink, Use Global temporary table or set operator to reduce network trip
No, use pure SQL
6) Use EXTERNAL Table to build interface rather then creating custom table and program to Load and validate the data
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7) Understand Oracle's Cost based Optimizer and Tune most expensive SQL queries with help of Explain plan
What about using the execution trace?
8) Follow Oracle PL/SQL Best Practices
Which are?
9) Review tables and their indexes being used in the SQL queries and avoid unnecessary Table scanning
You mean design your database and queries properly? And table scanning is not always bad.
10) Avoid costly Full Table Scan on Big Transaction tables with Huge data volume,
It depends if that is necessary or not.
11) Use appropriate filtration condition on index columns of seeded Oracle tables directly mapped to program parameters
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12) Review Join condition on existing query explain plan
Well, if you don't have your join conditions right then your query won't work, so that's obvious.
13) Use Oracle hint to guide Oracle Cost based optimizer to choose best plan for your custom queries
No. Oracle recommends you do not use hints for query optimization (it says so in the documentation). Only certain hints such as APPEND etc. which are more related to certain operations such as inserting data etc. are acceptable in general. Oracle recommends you use the query optimization tools to help optimize your queries rather than use hints.
14) Avoid applying SQL functions on index columns
Why? If there's a need for a function based index, then it should be used.
15) Use appropriate hint to guide Oracle CBO to choose best plan to reduce response time
See 13.
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1   libobjc.A.dylib                         0x0000000100c79721 map_images_nolock + 1266
2   libobjc.A.dylib                         0x0000000100c62761 map_images + 115
3   dyld                                    0x00007fff5fc039c5 dyld::notifyBatchPartial(dyld_image_states, bool, char const* (*)(dyld_image_states, unsigned int, dyld_image_info const*)) + 853
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5   dyld                                    0x00007fff5fc04d54 dyld::link(ImageLoader*, bool, ImageLoader::RPathChain const&) + 118
6   dyld                                    0x00007fff5fc08f7c dlopen + 490
7   libSystem.B.dylib                       0x0000000100a14e40 dlopen + 61
8   com.apple.CoreFoundation                0x0000000100d78ef7 _CFBundleDlfcnLoadBundle + 231
9   com.apple.CoreFoundation                0x0000000100d77e97 _CFBundleLoadExecutableAndReturnError + 1191
10 com.apple.Foundation                    0x0000000101008355 _NSBundleLoadCode + 638
11 com.apple.Foundation                    0x0000000101007c78 -[NSBundle loadAndReturnError:] + 742
12 com.apple.Foundation                    0x000000010101960c -[NSBundle principalClass] + 38
13 com.apple.framework.DUSupport           0x0000000100082080 -[DUModuleManager(_private) findDUModules:] + 405
14 com.apple.framework.DUSupport           0x0000000100081ed9 -[DUModuleManager orderedModuleListOfModules] + 40
15 com.apple.DiskUtility                   0x0000000100006082 0x100000000 + 24706
16 com.apple.DiskUtility                   0x0000000100005f59 0x100000000 + 24409
17 com.apple.AppKit                        0x0000000101444625 -[NSWindowController _windowDidLoad] + 538
18 com.apple.AppKit                        0x00000001013e1f77 -[NSWindowController window] + 112
19 com.apple.AppKit                        0x00000001015f61d9 -[NSWindowController showWindow:] + 47
20 com.apple.AppKit                        0x00000001015c7c5c -[NSDocument showWindows] + 98
21 com.apple.AppKit                        0x00000001015c64bb -[NSDocumentController openUntitledDocumentAndDisplay:error:] + 340
22 com.apple.AppKit                        0x00000001014f7b44 -[NSDocumentController(NSInternal) _openUntitled] + 111
23 com.apple.AppKit                        0x00000001014f79ab -[NSApplication _doOpenUntitled] + 257
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25 com.apple.AppKit                        0x00000001014f6fd9 -[NSApplication(NSAppleEventHandling) _handleCoreEvent:withReplyEvent:] + 77
26 com.apple.Foundation                    0x0000000100ffd0d6 -[NSAppleEventManager dispatchRawAppleEvent:withRawReply:handlerRefCon:] + 360
27 com.apple.Foundation                    0x0000000100ffcf06 _NSAppleEventManagerGenericHandler + 114
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29 com.apple.AE                            0x0000000104d73224 dispatchEventAndSendReply(AEDesc const*, AEDesc*) + 32
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31 com.apple.HIToolbox                     0x00000001028a0619 AEProcessAppleEvent + 48
32 com.apple.AppKit                        0x00000001013fc095 _DPSNextEvent + 1191
33 com.apple.AppKit                        0x00000001013fb801 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 155
34 com.apple.AppKit                        0x00000001013c168f -[NSApplication run] + 395
35 com.apple.AppKit                        0x00000001013ba3b0 NSApplicationMain + 364
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37 com.apple.DiskUtility                   0x0000000100001db8 0x100000000 + 7608
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1   libSystem.B.dylib                       0x0000000100a29add _dispatch_mgr_invoke + 154
2   libSystem.B.dylib                       0x0000000100a297b4 _dispatch_queue_invoke + 185
3   libSystem.B.dylib                       0x0000000100a292de _dispatch_worker_thread2 + 252
4   libSystem.B.dylib                       0x0000000100a28c08 _pthread_wqthread + 353
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Dimitri
http://dgielis.blogspot.com
http://www.apex-evangelists.com

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