Could Not Lock User Prefs. Unix Error Code 24. Websphere
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Could not lock User prefs Websphere; startup; FileSystemPreferences; user prefs; prefs; Could not lock couldn't flush user prefs: java.util.prefs.backingstoreexception: couldn't get file lock. User prefs Technote (troubleshooting) Problem(Abstract) Warning message issued during the websphere too many open files non-root or root startup of WebSphere stating that it can not lock the user or java.io.ioexception: too many open files linux system preferences. Symptom The following message can be seen in the systemout.log: [9/11/11 18:03:19:921 EDT] 00000001 prefs W java.util.prefs.FileSystemPreferences syncWorld Couldn't flush user prefs: java.util.prefs.BackingStoreException: Couldn't could not lock system prefs. unix error code 7. get file lock. [9/11/11 18:03:49:929 EDT] 00000001 prefs W java.util.prefs.FileSystemPreferences checkLockFile0ErrorCode Could not lock User prefs. Unix error code 2. Cause The non-root ID that is being used to start WebSphere Application Server does not have a user_home directory. Therefore this non-root ID is unable to access the root user's "/etc/.java/.systemPrefs". This
Could Not Lock System Prefs. Unix Error Code 0
produces the aforementioned warning messages every 30 seconds in the profile_root/logs/server_name/systemout.log. The root ID used to start Websphere Application Server can not find the Java system pref file. Diagnosing the problem For non-root, you can confirm this issue by trying to start WebSphere using the "root" ID. Review the Websphere_Home/profiles/ Mobile, Appliances, UrbanCode, and more! Following the IBM Social Computing Guidelines - Steve Webb, Stacy Cannon Facebook Twitter Google LinkedIn RSS Related posts Tracking MQ Technica... Updated Likes 1 Comments java.util.prefs.filesystempreferences checklockfile0errorcode 0 Common issues during... Updated Likes 2 Comments 0 openssh的三种tcp端口转发参数 Updated Likes 0 Comments 0 Do warning: couldn't create user preferences directory. user preferences are unusable. you know the IBM ... Updated Likes 0 Comments 0 Using property files... Updated Likes 0 Comments 0 Similar Ideas Global configuration... Ideation Blog: WebSphere App... m.fatih http://www-01.ibm.com/support/docview.wss?uid=swg21515420 3100001ATT Updated 0 Comments 0 Links Disclaimer & Trademark Social Media Channels for Clou... Cloud Technical Support Facebo... Notes From Rational Support Bl... IT Service Management blogs Business Process Management bl... Tags Resolve "Too Many Open files error" and "native OutOfMemory due to failed to create thread" issues in WebSphere Application Server running on https://www.ibm.com/developerworks/community/blogs/aimsupport/entry/resolve_too_many_open_files_error_and_native_outofmemory_due_to_failed_to_create_thread_issues_in_websphere_application_server_running_on_linux Linux Saritha@L2 0600026V6R | | Comment (1) | Visits (13217) Tweet We receive quite a few problem records (PMRs) / service requests (SRs) for native OutOfMemory issues in WebSphere Application Server and one of most famous native OOM issues happens particularly on Linux OS due to insufficient ulimit -u(NPROC) value. We also receive a good number of PMRs for "Too many Open Files" error for WebSphere Application Server running on Linux. With simple troubleshooting and ulimit command tuning, you can easily avoid opening a PMR with IBM support for these issues. 1) What is ulimit in Linux? The ulimit command allows you to control the user resource limits in the system such as process data size, process virtual memory, and process file size, number of process etc. 2) What happens when the settings in this command are not set up properly? Various issues happen like native OutOfMemory, Too Many Open files error, dump files are not bein Cloud apps, the contents of this article cannot be https://confluence.atlassian.com/confkb/could-not-lock-user-prefs-unix-error-code-2-670958391.html applied to Atlassian Cloud applications. Problem The following http://stackoverflow.com/questions/3384705/the-application-requester-cannot-establish-the-connection-too-many-open-files appears in theatlassian-confluence.log about every 2 milliseconds: 2014-09-28 13:24:33,960 WARN [Timer-10] [java.util.prefs] syncWorld Couldn't flush user prefs: java.util.prefs.BackingStoreException: Couldn't get file lock. -- referer: https://my.site.com | url: /display/SPACE/my+wiki | userName: username 2014-09-28 13:25:03,958 WARN [Timer-10] could not [java.util.prefs] checkLockFile0ErrorCode Could not lock User prefs. Unix error code 2. -- referer: https://my.site.com | url: /display/SPACE/my+wiki | userName: username 2014-09-28 13:25:03,960 WARN [Timer-10] [java.util.prefs] syncWorld Couldn't flush user prefs: java.util.prefs.BackingStoreException: Couldn't get file lock. -- referer: https://my.site.com | url: /display/SPACE/my+wiki | userName: username could not lock 2014-09-28 13:25:33,958 WARN [Timer-10] [java.util.prefs] checkLockFile0ErrorCode Could not lock User prefs. Unix error code 2. -- referer: https://my.site.com | url: /display/SPACE/my+wiki | userName: username 2014-09-28 13:25:33,960 WARN [Timer-10] [java.util.prefs] syncWorld Couldn't flush user prefs: java.util.prefs.BackingStoreException: Couldn't get file lock. -- referer: https://my.site.com | url: /display/SPACE/my+wiki | userName: username 2014-09-28 13:26:03,958 WARN [Timer-10] [java.util.prefs] checkLockFile0ErrorCode Could not lock User prefs. Unix error code 2. -- referer: https://my.site.com | url: /display/SPACE/my+wiki | userName: username Cause This occurs when the user being used to run Confluence does not have a writeable home directory (for example: /home/confluenceor~confluencedidn't exist). It is possible for a plugin to use the preferences module, which defaults to write to ~/.confluence/ Resolution Create the confluence user home directory. This is not $CONFLUENCE_HOME, it is the Linux user directory, f here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up The application requester cannot establish the connection. (Too many open files) up vote 0 down vote favorite I develop application run in Websphere work manager. work manager is used to run thread in the webpshere applications erver. Every 5 minutes my thread try to get some data from MySQL database from the different host from the application server machine. When the Host of MySql database turned off, The work manager always try to connect to MySQL database and I know my program will always get exception connection failure. this is the exception: com.mysql.jdbc.CommunicationsException: Communications link failure due to underlying exception But, over time my program get exception as follows: java.sql.SQLException: The application requester cannot establish the connection. (Too many open files) and this exception make my application server crash: [8/2/10 9:07:21:613 ICT] 00000d54 prefs W Could not lock User prefs. Unix error code 24. [8/2/10 9:07:21:613 ICT] 00000d54 prefs W Couldn't flush user prefs: java.util.prefs.BackingStoreException: Couldn't get file lock. I need suggestion how to fix this problem and prevent my application being crash ???? WorkEnvironment: Operation System AIX Application Server Webpshere 7.0 java mysql hibernate websphere aix share|improve this question editeCould Not Lock User Prefs.lock File Access Denied Websphere