displaying top 100 results
Portal Comment Comment on RIAForge decommissioning by Tom Chiverton
Comment on RIAForge decommissioning by Tom Chiverton
Comment on EWS End of life and Microsoft Graph by Tom Chiverton
Comment on EWS End of life and Microsoft Graph by Tom Chiverton
Portal Comment Comment on is anyone there ?? by Tom Chiverton
Comment on is anyone there ?? by Tom Chiverton
Tracker Comment Comment on cfgrid seems to be confusing columns by Tom W.
Comment on cfgrid seems to be confusing columns by Tom W.
Tracker Comment Comment on isDate returns true for numbers by Tom C.
Comment on isDate returns true for numbers by Tom C.
Tracker Comment Comment on isDate returns true for numbers by Tom C.
Comment on isDate returns true for numbers by Tom C.
Portal Comment Comment on Adobe ColdFusion Comprehensive Guide (More Powerful, More Modernized, More Alive) by Tom Chiverton
Comment on Adobe ColdFusion Comprehensive Guide (More Powerful, More Modernized, More Alive) by Tom Chiverton
Tracker Comment Comment on isDate returns true for numbers by Tom C.
Comment on isDate returns true for numbers by Tom C.
4191828 CF-4201953 john t. Additional info
SUSE Linux Enterprise Server 12 (x86_64)
VERSION = 12
PATCHLEVEL = 3
ENV
CATALINA_HOME=/opt/TomCat/tomcat
CATALINA_BASE=/opt/TomCat/tomcat
JRE_HOME=/opt/TomCat/java/jre
JAVA_ROOT=/opt/TomCat/java/jre
Java Runtime Environment build 1.8.0_162-b12
Apache
Portal Comment Comment on USPS Shipping API Ending TLS 1.1 and TLS 1.0 Support, is your ColdFusion Server Ready? by Tom Chiverton
Comment on USPS Shipping API Ending TLS 1.1 and TLS 1.0 Support, is your ColdFusion Server Ready? by Tom Chiverton
Portal Comment Comment on Default Function In Interface by Tom Chiverton
Comment on Default Function In Interface by Tom Chiverton
Portal Comment Comment on ColdFusion 9.01 by Tom Chiverton
Comment on ColdFusion 9.01 by Tom Chiverton
Portal Comment Comment on Support for Oracle 18c by Tom Chiverton
Comment on Support for Oracle 18c by Tom Chiverton
Portal Comment Comment on ColdFusion Builder 2018 – Datasource ‘XXX’ could not be found. by Tom Chiverton
Comment on ColdFusion Builder 2018 – Datasource ‘XXX’ could not be found. by Tom Chiverton
Tracker Comment Comment on isDate returns true for numbers by Tom C.
Comment on isDate returns true for numbers by Tom C.
Tracker Comment Comment on isDate() not working properly by Tom C.
Comment on isDate() not working properly by Tom C.
Tracker Comment Comment on isDate() not working properly by Tom C.
Comment on isDate() not working properly by Tom C.
Tracker Comment Comment on isDate('16.51p') eq true by Nimit S.
2609313 CF-3859758 Nimit S. Hi Tom,
I will closing that bug as duplicate. We will track that bug as part of this bug.
Portal Comment Comment on Writing CFMs without Semicolons by Tom Chiverton
Comment on Writing CFMs without Semicolons by Tom Chiverton
Portal Comment Comment on RIAForge decommissioning by Charlie Arehart
Charlie Arehart Thanks, JG.
And to Tom and Michael, when I made my comment (in reply to Tom's first), I prefaced it with "or" meaning if Adobe might balk at a generic proposal of "the community" somehow "continuing to run it". I was just proposing a more concrete proposal. I'm open myself to any
Portal Comment Comment on Query by week by Tom Chiverton
Comment on Query by week by Tom Chiverton
Comment on On converting from application.cfm to application.cfc by Tom Woo
Portal Comment Comment on ColdFusion2016 services are not getting started. They are stopped suddenly. by Tom Chiverton
Comment on ColdFusion2016 services are not getting started. They are stopped suddenly. by Tom Chiverton
2673134 CF-4149367 Language : Datastructure ext-user Metadata of a struct is not set for the duplicate of the struct. Problem:
Metadata of a struct is not set for the duplicate of the struct.
Method:
name=[fname='Tom',Lname='Yes'];
name.setmetadata({lname:'string'});
dup
Ashudeep Sharma Thanks Tom for the feedback, i have added a more appropriate use-case which shows a scenario where semicolons can be used to avoid the ambiguity.
Tracker Issue isDate returns true for numbers
2800609 CF-4198286 Core Runtime Tom Chiverton isDate returns true for numbers Problem Description:
isDate(17824761) returns true
Steps to Reproduce:
#isDate(17824761)#
Actual Result:
true
Expected Result:
false
Any Workarounds:
no
Tracker Comment Comment on CFLOCk with name does not always only allow one request at a time by HariKrishna K.
2608824 CF-3983192 HariKrishna K. Hi Tom,
Are you saying that this is not an issue? Can you please confirm?
Tracker Comment Comment on cfimage creates problems with the images with the extension .PNG on Localhost by External U.
2609106 CF-3929327 External U. Hi Preethi,
Was this also fixed for .tiff files? Please see Tom Hubbard's comment on 5:26:08 AM GMT+00:00 Aug 4, 2015.
Thanks!,
-Aaron
Tracker Comment Comment on cfimage creates problems with the images with the extension .PNG on Localhost by External U.
2609106 CF-3929327 External U. Hi Preethi,
What does "the next ColdFusion version" mean? Will it be come in a minor upgrade or will we have to wait for version 12?
Thanks,
Tom
Tracker Comment Comment on isDate('16.51p') eq true by External U.
2609313 CF-3859758 External U. Agree with Tom. The function is useless if it does type coercion to try to get a "yes" (sic) answer. "16.51p" is not a date.
2609384 CF-3851922 External U. Hi Tom,
It looks like the fix for #CF-3818770 introduced this regression, as it also worked correctly for me in CF11 Final.
Thanks!,
-Aaron
Tracker Comment Comment on isValid("email") is poorly implemented, in that it rejects a bunch of stuff that's legit by External U.
2613554 CF-3231157 External U. Hi Tom,
I just confirmed that Splendor Public Beta still returns "NO" for this:
isValid("email", "username@domain.??")
Thanks,
-Aaron
Tracker Issue CFIMAP action="getHeaderOnly" transfers message bodies
2608461 CF-4088913 Net Protocols : IMAP Tom Chiverton CFIMAP action="getHeaderOnly" transfers message bodies When using CFIMAP with action=getHeaderOnly then only the headers should be transferred from the server. In fact full mail bodies are, which causes excessive network traffic and overhead
Comment on On converting from application.cfm to application.cfc by Tom Woo
Comment on On converting from application.cfm to application.cfc by Tom Woo
Comment on On converting from application.cfm to application.cfc by Tom Woo
2608462 CF-4088896 Net Protocols : POP Tom Chiverton CFPOP doesn't create the query given by name="" with updater 7 installed Pre-updater 7, and as documented, CFPOP's name argument can be used to name the query returned.
Post-updater 7, this errors with " Variable MAIL is undefined. The error
Tracker Issue Bug 85961:(Watson Migration Closure)isJSON (etc) don't understand the application-level 'secure' JSON prefix settings
2597624 CF-3043159 Core Runtime : Application Tom Chiverton Bug 85961:(Watson Migration Closure)isJSON (etc) don't understand the application-level 'secure' JSON prefix settings Problem:
isJSON (etc) don't understand the application-level 'secure' JSON prefix settings
Method:
#is
Tracker Comment Comment on CF9.0.1 CHF 3 breaks valid CFC syntax by External U.
2596884 CF-3508592 External U. I've seen Tom run the code on his machine, and can verify this happens. I cannot replicate on 9.0.2 CHF1, but will try on CF 9.0.1 CHF3 early next week.
Note that the erroring code is NOT being called by the repro case, merely the act of instantiating the CFC causes
Charlie Arehart First, thanks for the kind feedback, Tom.
As for your question, you can still do that cfinclude in the application.cfc. What it does would control where (in what method if any) it should go.
And if some things in the included file should be run in different methods, create
Tracker Issue CFCHART should accept absolute paths as the 'style' argument, not only retaliative ('../../foo.json')
2609510 CF-3840078 Charting/Graphing Tom Chiverton CFCHART should accept absolute paths as the 'style' argument, not only retaliative ('../../foo.json') Enhancement Request
----------------------------- Additional Watson Details -----------------------------
Watson Bug ID: 3840078
External
3757338 CF-4200272 Dattanand M. @Tom could you please share with us the below details
1. Database used.
2. What type of data you are using to generate this chart.
3. As the error "java.lang.IllegalArgumentException" caused by the data passed, It would be good if you share with us some sample data.
Tracker Comment Comment on property no longer allowed as a function name within a function in a CFC by Aaron N.
4322446 CF-4202430 Aaron N. Hi Tom and Adobe,
Confirmed.
function property(){}
property();
Works in CF 10/11/2016. Throws "coldfusion.compiler.ScriptParseExceptions" in build 2018.0.01.308605 (PreRelease). Needs fixed.
Thanks!,
-Aaron
Comment on On converting from application.cfm to application.cfc by Tom Woo
Tracker Issue fileCopy() between S3 breaks meta data
2608340 CF-4118773 Core Runtime Tom Chiverton fileCopy() between S3 breaks meta data Problem Description:fileCopy fails to correctly copy meta data between resources on S3
Steps to Reproduce:
Create a file on S3 with Content-Type of 'application/pdf' and Cache-Control of 'max-age=300'
run file
Tracker Issue SessionRotate and SessionInvalidate Enhancements
2611114 CF-3640257 Security Tom McKeon SessionRotate and SessionInvalidate Enhancements The new CF10 methods SessionRotate and SessionInvalidate only work with CFID/CFToken. The methods don't work on the underlying J2EE session when using J2EE session variables as this might impact other
2613016 CF-3352745 Language : CF Component Tom Van Schoor properties with default values not accessible outside init function Problem Description: When creating a component with accessors="true" and a property with a default value the variables struct does not contain the property in any method
2598615 CF-3041132 Document Management : Office Integration Tom McNeer Bug 82405:cfspreadsheet write fails when used inside cffunction Duplicate ID: CF-3040949
Problem:
cfspreadsheet write fails when used inside cffunction
Method:
Given the following code
Tracker Issue isDate('9.69p') eq true
2609275 CF-3862961 Language Tom Chiverton isDate('9.69p') eq true Duplicate ID: CF-3859758
Problem Description:
isDate('9.69p') eq true
Steps to Reproduce:
#isDate('9.69p')#
Actual Result:
YES
Expected Result:
NO
Any Workarounds:
NO
----------------------------- Additional Watson Details
Tracker Issue XSS Bug on https://coldfusion.adobe.com
3858727 CF-4200573 Security : XSS anil tom XSS Bug on https://coldfusion.adobe.com Problem Description: XSS Bug on https://coldfusion.adobe.com/new-post/
Steps to Reproduce: 1st login in to the site
2nd the create a new post
3rd enter the details required
4th in the Add Tag enter the payload
second or so, and you should be able to easily view the problem immediately in the TomCat logs and CF logs, especially if you can simulate some light traffic on the server.
2608461 CF-4088913 HariKrishna K. Hi Tom,
I have tried using cfimap tag with action=getHeaderOnly, I am able to see only these headers:
answered
cc
deleted
draft
flagged
from
header
lines
messageid
messagenumber
recent
replyto
rxddate
seen
sentdate
size
subject
to
uid
Can you
Tracker Comment Comment on CFPOP doesn't create the query given by name="" with updater 7 installed by External U.
2608462 CF-4088896 External U. But *HANG ON*.
This broke in your updater. Whatever you did to break Tom's *production* code needs to be reversed. Pointing to a seven month old ticket you've not dealt with yet and closing this one is not acceptable.
You cannot expect people to go revise
Tracker Comment Comment on [ANeff] Bug for: CF Admin's "Use internal cache to store queries" description should mention a restart is required by External U.
2609115 CF-3928293 External U. Hi Tom,
Good catch :) When I saw that sentence, I thought it was missing a comma. As in:
"When checked, at server level, internal cache is used to store cached queries."
And I thought that sentence was then pointless, since CF Admin _is_ server-level. BUT, w
Tracker Comment Comment on isDate('16.51p') eq true by External U.
2609313 CF-3859758 External U. I agree in principle with the Adam and Tom. Adobe is too aggressive with trying to accommodate date/time fragments. Maybe we need an IsTime() function to validate time-only strings, and only have IsDate() return true for valid dates or full date/time strings.
In any
Portal Topic Incomplete Install CF2016 Update 7
(311392) matches that of Update 7, TomCat version was updated correctly and the new function GetCanonicalPath() is present.
The post Incomplete Install CF2016 Update 7 appeared first on ColdFusion. CF2016 Updates,ColdFusion 2016,Question,cf2016 updates,ColdFusion,coldfusion 2016,question
Tracker Issue isDate('16.51p') eq true
2609313 CF-3859758 Core Runtime Tom Chiverton isDate('16.51p') eq true Problem Description:
isDate() validates as true obviously invalid dates.
Steps to Reproduce:
Case 1: #isDate('16.51p')# #dateformat('16.51p')#
Case 2: isDate('9.69p') eq true
Actual Result:
YES 16-May-14
Expected Result
Tracker Issue Pie chart vanishes when a single 100% item, even though others in data set with value 0
2609395 CF-3850838 Charting/Graphing Tom Chiverton Pie chart vanishes when a single 100% item, even though others in data set with value 0 Problem Description:
When there are many values to put on a pie chart, but one comes out as 100%, the whole chart vanishes
Steps to Reproduce:
Run attached
Tracker Issue bar extends off left side of axis
2609477 CF-3844756 Charting/Graphing Tom Chiverton bar extends off left side of axis Problem Description:
The bar for the first stacked series starts in the wrong place
Steps to Reproduce:
run attached, rename to t.cfml
Actual Result:
top bar extends beyond left side of axis
Expected Result:
top
Tracker Issue unremovable white border on bar charts
2609478 CF-3844752 Charting/Graphing Tom Chiverton unremovable white border on bar charts Problem Description:
extra white space added between stacked series in bar chart
Steps to Reproduce:
run the attached (rename to t.cfml and hbarChartStyle.json
Actual Result:
white bar at end of each stacked
Portal Comment Comment on ColdFusion (2018 release) Update 5 and ColdFusion (2016 release) Update 12 released by theBLBDan
TomCat's Http11Nio to my advantage, which is why I even brought it up. I use it strictly as a reverse proxy style connector and let nginx or IIS do the real web service work. Agreeably, TomCat isn't feature rich as a pure stand-alone web service.
"Really, this topic is worthy of a blog post on its
2608848 CF-3977514 Net Protocols : HTTP Tom Lofts CFHTTP Illegal Argument: Illegal character in query at index X in CFHTTPPARAM Problem Description:
We have discovered a bug as part of an application migration from CF8 to CF11. In CF8 the 'name' attribute in the CFHTTPPARAM tag may contain special
Tracker Issue Global Memory Limit for In-Memory Virtual FileSystem exceeded messages on createObject / new Query that don't use RAM drive
2609114 CF-3928294 File Management : VFS-RAM Tom Chiverton Global Memory Limit for In-Memory Virtual FileSystem exceeded messages on createObject / new Query that don't use RAM drive Problem Description:
Intermittent "Global Memory Limit 300 MB for In-Memory Virtual FileSystem exceeded" messages
Tracker Issue Bug 83598:My scheduled tasks listing page has an error on saying:"7/14/2010 11:25:00 PM is an invalid date format
2598067 CF-3041779 Scheduler Tom Jenkins Bug 83598:My scheduled tasks listing page has an error on saying:"7/14/2010 11:25:00 PM is an invalid date format Problem:
My scheduled tasks listing page has an error on saying:"7/14/2010 11:25:00 PM is an invalid date format." .Its coming from the LAST
2598074 CF-3041770 Language : Functions Tom McNeer Bug 83591:(Watson Migration Closure)isDate function gives incorrect results Problem:
isDate function gives incorrect results. dateFormat and LSDateFormat give inconsistent results
Method:
Certain incorrect date strings can be identifed as valid
Tracker Issue CF11 update 3 breaks chart style json that uses legend
2609237 CF-3865484 Charting/Graphing Tom Chiverton CF11 update 3 breaks chart style json that uses legend Problem Description:
Under CF11 update 2, you could turn legnds on CFCHART off using ZingChart's style JSON files.
Under update 3, this causes a ColdFusion exception (!)
Steps to Reproduce
2609491 CF-3842831 Installation/Config : Installer Tom Chiverton Install disk space check checks root file system, not installation folder I set the install folder to the default in /opt, yet the installer at the end moans:
Installation Directories:
Product: /opt/coldfusion11
...
Disk Space
Tracker Issue incorrect series total in tooltip
2609492 CF-3842819 Charting/Graphing Tom Chiverton incorrect series total in tooltip Problem Description:
When drawing a stacked series,
Steps to Reproduce:
run attached CFML file. You'll need to rename it.
hover over the (small) 'bar' stack
Actual Result:
tool tip says '0 of 1'
Expected Result
2610612 CF-3691289 Database Tom Kostiainen Microsoft Access with Unicode driver not available on 64 bit platform Problem Description:
The Microsoft Access with Unicode database driver is no longer available. The only available driver does not support unicode.
Driver availablility is mentioned
2596869 CF-3529221 CFExchange Tom Hubbard CFEXCHANGECONNECTION fails on password with percent sign. Problem Description:
We are experiencing an error when the password used in a call to cfexchangeconnection contains a % symbol.
The error message (which differs from a bad password error message
Tracker Issue Cannot Delete Log Files
:
External Customer Name: gozargozarian3
External Customer Email:
External Test Config: My Hardware and Environment details: Windows Server and Windows 7, IIS 7.5, Coldfusion 10 using the Standard Install (w/ TomCat). Found these issues using CF 9 and 9, and it was in a Windows environment as well with a
2613522 CF-3298179 Language Tom Lofts ColdFusion 10 form variable functionality change relating to case of variables Problem Description:
I have come across a bug/change in functionality relating to the use of multiple form fields using the same name. In ColdFusion 9 these would have been appended
Tracker Comment Comment on isValid("email") is poorly implemented, in that it rejects a bunch of stuff that's legit by External U.
email addresses
-----------
Since Tom Chiverton took care of logging 83327, his vote is implied.
", "Ringo"];
cfloop( array="#myArray#", index="idx"){ writeoutput(#idx# & ""); }
{code}
{code:java}
Team = ["Marketing" = "John", "Sales" : ["Executive" : "Tom", "Assistant" = "Mike"],"IT":["Developers":["Dev1":"Ashley","Dev2"="Jason"]]];
cfloop( collection="#Team#" ,item="key" ){
writeoutput
Portal Comment Comment on ColdFusion 9.01 by Charlie Arehart
Charlie Arehart While Tom is certainly right, I would say to Mahern that what you may be experiencing is that while you THINK that Java was updated, perhaps it was not. There are many things that can go amiss. If you look at the CF Admin "settings summary" (last option in the first section
2597494 CF-3043735 Language : CF Component Tom Chiverton Bug 86824:(Watson Migration Closure)Even very simple querys take a large performance hit (x2 up to x10 times longer to execute) using the Query CFC rather than CFQUERY, basically meaning they can't be used for any frequently accessed si
.home}/work/Catalina/localhost/ROOT/_axis2", "write";
permission java.io.FilePermission "${catalina.home}/work/Catalina/localhost/ROOT/-", "read";
permission java.io.FilePermission "/opt/TomCat/jdk1.8.0_162/jre/lib/xalan.properties", "read";
permission java.io.FilePermission "/opt/TomCat/jdk1.8.0_162/jre/lib/rt.jar", "read";
permission
2608824 CF-3983192 Core Runtime Tom Chiverton CFLOCk with name does not always only allow one request at a time Under only moderate load, we get pairs of stuck threads due to trying to duplicate() a shared object in a CFC.
To prevent this, we use a named CFLOCK to single thread requests.
However
Tracker Issue CFHTTP does not always abort after timeout interval
2609086 CF-3934737 Performance Tom Chiverton CFHTTP does not always abort after timeout interval Even with setting a timeout on CFHTTP calls, sometimes the thread sticks and doesn't terminate untill CF is restarted.
We set a timeout of 30, but have requests that run into tens of thousands
2599240 CF-3040435 File Management : VFS-S3 Tom Bishop Bug 80741:When copying a directory (using cffile and cfdirectory tags) and then trying to delete the source directory it appears that certain files are remaining locked resulting in the following error: Coldfu Problem:
When copying a
Tracker Issue Object Literal Syntax for Ordered/Sorted Structs
= {
"John": "Sales",
"Tom": "Finance",
"Mike": "Education"
}
(BTW, what a terrible code example)
----------------------------- Additional Watson Details -----------------------------
Watson Bug ID: 4126544
External Customer Info:
External Company: CFXchange.com
External Customer Name: Abram
Tracker Issue Unable to import large CF9 settings (~1500 data sources)
2609403 CF-3850033 Installation/Config : Config Tom Chiverton Unable to import large CF9 settings (~1500 data sources) Problem Description:
When importing my CF9 settings, the migration wizard hung for exactly 50 minutes, then stopped with a time out.
Restarting the wizard the same thing happens
Tracker Issue Scheduled task renaming creates a new one
2596698 CF-3731802 Administrator Tom Jenkins Scheduled task renaming creates a new one Problem Description: When you rename a currently existing scheduled task, it creates a brand new one. Also renaming the scheduled task to an existing names scheduled task, overrides the second existing
Tracker Issue Cannot edit or delete scheduled tasks
2613031 CF-3351451 Scheduler Tom Lofts Cannot edit or delete scheduled tasks Duplicate ID: CF-3701046
Problem Description:
We recently put a fresh install of ColdFusion 10 on a server and created a number of scheduled tasks. I'm now looking to edit or delete one of the scheduled tasks, but when
2613172 CF-3341684 Installation/Config : Connector Tom Lofts Redirection to URL in IIS6 website redirecting to /jakarta/isapi_redirect.dll Problem Description:
I installed ColdFusion 10 (now updated to update 1) and configured the connector to run on all sites for IIS6. ColdFusion is running
Tracker Issue Bug 79271:(Watson Migration Closure)[ANeff] ER for: getWSDL() for getting WSDL from CFC w/o requring network call to CFC
://prerelease.adobe.com/r/?c5dbec9c23c647f886f3cdc5b27f0fefComment from Tom:Doesn’t the WSDL need the host name embeded in it ? If so, no biggy, but the syntax would need to be getWSDL(localCFCPath,strHostName)Comment from Ray:I agree - to me - this is something CF does already, but is hidden,and in almost all cases, I feel
file. In reality it's for converting a spreadsheet object into binary to facililitate WRITING it to file.Tom Chiverton suggested "spreadSheetToBinary" which sounds about right to me. Then again, perhaps this functionality is just the remit of toBinary(), and that should be adjusted to work
this strange intermittent problem identified in this bug report, as well as significant numbers of 502 "bad gateway" errors with the TomCat isapi_redirector.dll.
We were not including a thread wait/join, because we truly wanted the page thread to end as soon as possible and just have the spawned thread
Tracker Issue ColdFusion breaks itself when the disk fills up
2609494 CF-3842800 Core Runtime Tom Chiverton ColdFusion breaks itself when the disk fills up Problem Description:
When the disk containing the CF install root has no disk space, CF still attempts to rewrite various neo*xml files, creating empty or partial versions, which will break CF on restart
Tracker Issue CF9.0.1 CHF 3 breaks valid CFC syntax
2596884 CF-3508592 Core Runtime Tom Chiverton CF9.0.1 CHF 3 breaks valid CFC syntax Problem Description: Valid CFCs throw undefined variable run time errors, fine without CHF3 applied.
Steps to Reproduce:
Put both files in test configuration on a CF 9.0.1 server with CHF3. 1.6 or 1.7 JVM doesn
SetCell(qUsers,"usename","Ben");querySetCell(qUsers,"userID",2);querySetCell(qUsers,"usename","Tom");querySetCell(qUsers,"userID",3);writeDump(qUsers);queryService = new Query();//queryService.setName("qGetUserByID");queryService.setDBType("query");queryService.addParam(name="userID", cfsqltype="cf_sql_varchar", value="1");SaveContent variable
2612213 CF-3540118 Language : Functions Tom Lofts ColdFusion not responding after clock change from GMT to BST We run a ColdFusion 10 server with a timezone set to GMT (Dublin, Edinburgh, Lisbon, London) which has started experiencing issues since the switch to British Summer Time on 31
Tracker Issue Comparison method violates its general contract! null
3757338 CF-4200272 Charting/Graphing Tom Lofts Comparison method violates its general contract! null Problem Description:
I have a CFChart component which is now reporting the above error.
Stack trace:
java.lang.IllegalArgumentException: Comparison method violates its general contract! at java