Fail to do project import due to issue field test limitation

I was doing project import on Jira 6.5-SNAPSHOT. It pass the project import validation stage and fail while it's importing the XML.

The following is a snipper of the exception in the log that prevented the import process.

"2015-05-20 19:38:09,968 JiraTaskExectionThread-3 INFO mahmad[atlassian] 1178x1071x1 1ypmrr6 0:0:0:0:0:0:0:1 /secure/admin/ProjectImportSummary.jspa [jira.imports.project.DefaultProjectImportManager] Creating the issues.
2015-05-20 19:38:11,257 ProjectImport: CreateIssues:thread-9 ERROR mahmad[atlassian] 1178x1071x1 1ypmrr6 0:0:0:0:0:0:0:1 /secure/admin/ProjectImportSummary.jspa [jira.imports.project.DefaultProjectImportPersister] Unable to create issue with key 'PERF-1379'.
com.atlassian.jira.external.ExternalException: Unable to create issue: koto - temporary files - not being deleted
at com.atlassian.jira.external.ExternalUtils.createIssue(ExternalUtils.java:246)
at com.atlassian.jira.imports.project.DefaultProjectImportPersister.createIssue(DefaultProjectImportPersister.java:147)
at com.atlassian.jira.imports.project.handler.IssuePersisterHandler$1.run(IssuePersisterHandler.java:78)
at com.atlassian.jira.util.concurrent.BoundedExecutor$1.run(BoundedExecutor.java:58)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: com.atlassian.jira.exception.IssueFieldsCharacterLimitExceededException
at com.atlassian.jira.issue.managers.DefaultIssueManager.validateCreateIssueTextFieldsLength(DefaultIssueManager.java:686)
at com.atlassian.jira.issue.managers.DefaultIssueManager.createIssue(DefaultIssueManager.java:651)
at com.atlassian.jira.external.ExternalUtils.createIssue(ExternalUtils.java:235)
... 6 more
2015-05-20 19:38:11,471 ProjectImport: CreateIssues:thread-8 ERROR mahmad[atlassian] 1178x1071x1 1ypmrr6 0:0:0:0:0:0:0:1 /secure/admin/ProjectImportSummary.jspa [jira.imports.project.DefaultProjectImportPersister] Unable to create issue with key 'PERF-1625'.
com.atlassian.jira.external.ExternalException: Unable to create issue: MPL - Ubuntu - Package Upgrades - USNs 1909-1, 1910-1, 1914-1, 1923-1
at com.atlassian.jira.external.ExternalUtils.createIssue(ExternalUtils.java:246)
at com.atlassian.jira.imports.project.DefaultProjectImportPersister.createIssue(DefaultProjectImportPersister.java:147)
at com.atlassian.jira.imports.project.handler.IssuePersisterHandler$1.run(IssuePersisterHandler.java:78)
at com.atlassian.jira.util.concurrent.BoundedExecutor$1.run(BoundedExecutor.java:58)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: com.atlassian.jira.exception.IssueFieldsCharacterLimitExceededException
at com.atlassian.jira.issue.managers.DefaultIssueManager.validateCreateIssueTextFieldsLength(DefaultIssueManager.java:686)
at com.atlassian.jira.issue.managers.DefaultIssueManager.createIssue(DefaultIssueManager.java:651)
at com.atlassian.jira.external.ExternalUtils.createIssue(ExternalUtils.java:235)
... 6 more
2015-05-20 19:38:11,628 ProjectImport: CreateIssues:thread-5 ERROR mahmad[atlassian] 1178x1071x1 1ypmrr6 0:0:0:0:0:0:0:1 /secure/admin/ProjectImportSummary.jspa [jira.imports.project.DefaultProjectImportPersister] Unable to create issue with key 'PERF-609'.
com.atlassian.jira.external.ExternalException: Unable to create issue: PageObject failure in ChangesetPage
at com.atlassian.jira.external.ExternalUtils.createIssue(ExternalUtils.java:246)
at com.atlassian.jira.imports.project.DefaultProjectImportPersister.createIssue(DefaultProjectImportPersister.java:147)
at com.atlassian.jira.imports.project.handler.IssuePersisterHandler$1.run(IssuePersisterHandler.java:78)
at com.atlassian.jira.util.concurrent.BoundedExecutor$1.run(BoundedExecutor.java:58)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: com.atlassian.jira.exception.IssueFieldsCharacterLimitExceededException
at com.atlassian.jira.issue.managers.DefaultIssueManager.validateCreateIssueTextFieldsLength(DefaultIssueManager.java:686)
at com.atlassian.jira.issue.managers.DefaultIssueManager.createIssue(DefaultIssueManager.java:651)
at com.atlassian.jira.external.ExternalUtils.createIssue(ExternalUtils.java:235)
... 6 more"

Version used: "jira-standalone-distribution-6.5-20150504.034254-210-standalone"