{"action":"created","issue":{"url":"https://api.github.com/repos/ical4j/ical4j/issues/238","repository_url":"https://api.github.com/repos/ical4j/ical4j","labels_url":"https://api.github.com/repos/ical4j/ical4j/issues/238/labels{/name}","comments_url":"https://api.github.com/repos/ical4j/ical4j/issues/238/comments","events_url":"https://api.github.com/repos/ical4j/ical4j/issues/238/events","html_url":"https://github.com/ical4j/ical4j/issues/238","id":323942370,"node_id":"MDU6SXNzdWUzMjM5NDIzNzA=","number":238,"title":"Upgrade from 1.x to 2.1.0","user":{"login":"tarunvrma","id":9607194,"node_id":"MDQ6VXNlcjk2MDcxOTQ=","avatar_url":"https://avatars0.githubusercontent.com/u/9607194?v=4","gravatar_id":"","url":"https://api.github.com/users/tarunvrma","html_url":"https://github.com/tarunvrma","followers_url":"https://api.github.com/users/tarunvrma/followers","following_url":"https://api.github.com/users/tarunvrma/following{/other_user}","gists_url":"https://api.github.com/users/tarunvrma/gists{/gist_id}","starred_url":"https://api.github.com/users/tarunvrma/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/tarunvrma/subscriptions","organizations_url":"https://api.github.com/users/tarunvrma/orgs","repos_url":"https://api.github.com/users/tarunvrma/repos","events_url":"https://api.github.com/users/tarunvrma/events{/privacy}","received_events_url":"https://api.github.com/users/tarunvrma/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":6,"created_at":"2018-05-17T09:29:10Z","updated_at":"2018-08-09T08:40:57Z","closed_at":null,"author_association":"NONE","body":"When i was trying to upgrade ical4j from 1.x to 2.1.0 but i am getting the following issues. Could you help us out what exactly the issues are?\r\n\r\nIssue #1\r\n[2018-05-16 14:08:13,245] [main] TimeZoneRegistryImpl WARN - Error occurred loading VTimeZone\r\njava.lang.NullPointerException: dayOfWeek must not be null\r\nat org.threeten.bp.jdk8.Jdk8Methods.requireNonNull(Jdk8Methods.java:79)\r\nat org.threeten.bp.temporal.TemporalAdjusters.firstInMonth(TemporalAdjusters.java:262)\r\nat net.fortuna.ical4j.model.TimeZoneRegistryImpl.addTransitionRules(TimeZoneRegistryImpl.java:371)\r\nat net.fortuna.ical4j.model.TimeZoneRegistryImpl.generateTimezoneForId(TimeZoneRegistryImpl.java:342)\r\nat net.fortuna.ical4j.model.TimeZoneRegistryImpl.loadVTimeZone(TimeZoneRegistryImpl.java:254)\r\nat net.fortuna.ical4j.model.TimeZoneRegistryImpl.getTimeZone(TimeZoneRegistryImpl.java:213)\r\n\r\n​\r\n\r\nIssue #2\r\n2018-05-16 14:08:13,687] [main] TimeZoneRegistryImpl WARN - **Error occurred loading VTimeZone\r\njava.util.NoSuchElementException**\r\nat java.util.Collections$EmptyIterator.next(Collections.java:4189)\r\nat java.util.Collections.min(Collections.java:635)\r\nat net.fortuna.ical4j.model.TimeZoneRegistryImpl.addTransitionRules(TimeZoneRegistryImpl.java:352)\r\nat net.fortuna.ical4j.model.TimeZoneRegistryImpl.generateTimezoneForId(TimeZoneRegistryImpl.java:342)\r\nat net.fortuna.ical4j.model.TimeZoneRegistryImpl.loadVTimeZone(TimeZoneRegistryImpl.java:254)\r\nat net.fortuna.ical4j.model.TimeZoneRegistryImpl.getTimeZone(TimeZoneRegistryImpl.java:213)\r\n\r\n\r\nSimilar to issue 2\r\n[2018-05-16 14:08:13,682] [main] TimeZoneRegistryImpl WARN - Error occurred loading VTimeZone\r\njava.util.NoSuchElementException\r\nat java.util.ArrayList$Itr.next(ArrayList.java:862)\r\nat java.util.Collections$UnmodifiableCollection$1.next(Collections.java:1042)\r\nat java.util.Collections.min(Collections.java:635)\r\nat net.fortuna.ical4j.model.TimeZoneRegistryImpl.addTransitionRules(TimeZoneRegistryImpl.java:352)\r\nat net.fortuna.ical4j.model.TimeZoneRegistryImpl.generateTimezoneForId(TimeZoneRegistryImpl.java:342)\r\nat net.fortuna.ical4j.model.TimeZoneRegistryImpl.loadVTimeZone(TimeZoneRegistryImpl.java:254)\r\nat net.fortuna.ical4j.model.TimeZoneRegistryImpl.getTimeZone(TimeZoneRegistryImpl.java:213)\r\nat net.fortuna.ical4j.model.TimeZoneRegistryImpl.getTimeZone(TimeZoneRegistryImpl.java:206)\r\n\r\n\r\nIssue #3\r\n[2018-05-16 14:08:13,674] [main] TimeZoneRegistryImpl WARN - Error occurred loading VTimeZone\r\norg.threeten.bp.zone.ZoneRulesException: Unknown time-zone ID: SystemV/YST9YDT\r\nat org.threeten.bp.zone.ZoneRulesProvider.getProvider(ZoneRulesProvider.java:167)\r\nat org.threeten.bp.zone.ZoneRulesProvider.getRules(ZoneRulesProvider.java:122)\r\nat org.threeten.bp.ZoneRegion.ofId(ZoneRegion.java:143)\r\nat org.threeten.bp.ZoneId.of(ZoneId.java:358)\r\nat org.threeten.bp.ZoneId.of(ZoneId.java:286)\r\nat net.fortuna.ical4j.model.TimeZoneRegistryImpl.generateTimezoneForId(TimeZoneRegistryImpl.java:332)\r\nat net.fortuna.ical4j.model.TimeZoneRegistryImpl.loadVTimeZone(TimeZoneRegistryImpl.java:254)\r\nat net.fortuna.ical4j.model.TimeZoneRegistryImpl.getTimeZone(TimeZoneRegistryImpl.java:213)\r\n\r\n\r\nSimilar to issue 3\r\n[2018-05-16 14:08:13,666] [main] TimeZoneRegistryImpl WARN - Error occurred loading VTimeZone\r\norg.threeten.bp.zone.ZoneRulesException: Unknown time-zone ID: SystemV/MST7MDT\r\nat org.threeten.bp.zone.ZoneRulesProvider.getProvider(ZoneRulesProvider.java:167)\r\nat org.threeten.bp.zone.ZoneRulesProvider.getRules(ZoneRulesProvider.java:122)\r\nat org.threeten.bp.ZoneRegion.ofId(ZoneRegion.java:143)\r\nat org.threeten.bp.ZoneId.of(ZoneId.java:358)\r\nat org.threeten.bp.ZoneId.of(ZoneId.java:286)\r\nat net.fortuna.ical4j.model.TimeZoneRegistryImpl.generateTimezoneForId(TimeZoneRegistryImpl.java:332)\r\nat net.fortuna.ical4j.model.TimeZoneRegistryImpl.loadVTimeZone(TimeZoneRegistryImpl.java:254)\r\nat net.fortuna.ical4j.model.TimeZoneRegistryImpl.getTimeZone(TimeZoneRegistryImpl.java:213)\r\n\r\nSimilar to issue 3\r\n[2018-05-16 14:08:13,663] [main] TimeZoneRegistryImpl WARN - Error occurred loading VTimeZone\r\norg.threeten.bp.zone.ZoneRulesException: Unknown time-zone ID: SystemV/HST10\r\nat org.threeten.bp.zone.ZoneRulesProvider.getProvider(ZoneRulesProvider.java:167)\r\nat org.threeten.bp.zone.ZoneRulesProvider.getRules(ZoneRulesProvider.java:122)\r\nat org.threeten.bp.ZoneRegion.ofId(ZoneRegion.java:143)\r\nat org.threeten.bp.ZoneId.of(ZoneId.java:358)\r\nat org.threeten.bp.ZoneId.of(ZoneId.java:286)\r\n"},"comment":{"url":"https://api.github.com/repos/ical4j/ical4j/issues/comments/411682915","html_url":"https://github.com/ical4j/ical4j/issues/238#issuecomment-411682915","issue_url":"https://api.github.com/repos/ical4j/ical4j/issues/238","id":411682915,"node_id":"MDEyOklzc3VlQ29tbWVudDQxMTY4MjkxNQ==","user":{"login":"gkondayap","id":40271825,"node_id":"MDQ6VXNlcjQwMjcxODI1","avatar_url":"https://avatars1.githubusercontent.com/u/40271825?v=4","gravatar_id":"","url":"https://api.github.com/users/gkondayap","html_url":"https://github.com/gkondayap","followers_url":"https://api.github.com/users/gkondayap/followers","following_url":"https://api.github.com/users/gkondayap/following{/other_user}","gists_url":"https://api.github.com/users/gkondayap/gists{/gist_id}","starred_url":"https://api.github.com/users/gkondayap/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/gkondayap/subscriptions","organizations_url":"https://api.github.com/users/gkondayap/orgs","repos_url":"https://api.github.com/users/gkondayap/repos","events_url":"https://api.github.com/users/gkondayap/events{/privacy}","received_events_url":"https://api.github.com/users/gkondayap/received_events","type":"User","site_admin":false},"created_at":"2018-08-09T08:40:57Z","updated_at":"2018-08-09T08:40:57Z","author_association":"NONE","body":"Thank you for your reply Ben.  I have upgraded ical4j-3.0.1.  I notice this error arises only for 2 timezones (Asia/Tehran , Iran).   Could  you please elaborate your suggested choices. \r\nI did't find a way to override any methods like register() in . Most of them are final methods.\r\n\r\n\r\n"}}
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