「Slackのメッセージをクロールする」の記事により、設定は完了しましたが、
クローラーを実行したときに、NullPointerException出て、
一部内容だけクロールしました。
2021-01-29 11:39:02,347 [2AtwQncBEGZyDcBMreIU-1] ERROR Failed to process a data crawling: Slack
java.lang.NullPointerException: null
at org.codelibs.fess.ds.slack.SlackClient.getMessageReplies(SlackClient.java:356) ~[fess-ds-slack-13.9.0.jar:?]
at org.codelibs.fess.ds.slack.SlackClient.getMessageReplies(SlackClient.java:338) ~[fess-ds-slack-13.9.0.jar:?]
at org.codelibs.fess.ds.slack.SlackDataStore.processMessageReplies(SlackDataStore.java:211) ~[fess-ds-slack-13.9.0.jar:?]
at org.codelibs.fess.ds.slack.SlackDataStore.lambda$processChannelMessages$1(SlackDataStore.java:189) ~[fess-ds-slack-13.9.0.jar:?]
at java.util.concurrent.ThreadPoolExecutor$CallerRunsPolicy.rejectedExecution(ThreadPoolExecutor.java:2027) ~[?:?]
at java.util.concurrent.ThreadPoolExecutor.reject(ThreadPoolExecutor.java:825) ~[?:?]
at java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:1355) ~[?:?]
at org.codelibs.fess.ds.slack.SlackDataStore.lambda$processChannelMessages$2(SlackDataStore.java:186) ~[fess-ds-slack-13.9.0.jar:?]
at java.util.ArrayList.forEach(ArrayList.java:1541) ~[?:?]
at org.codelibs.fess.ds.slack.SlackClient.getChannelMessages(SlackClient.java:328) ~[fess-ds-slack-13.9.0.jar:?]
at org.codelibs.fess.ds.slack.SlackClient.getChannelMessages(SlackClient.java:318) ~[fess-ds-slack-13.9.0.jar:?]
at org.codelibs.fess.ds.slack.SlackDataStore.processChannelMessages(SlackDataStore.java:185) ~[fess-ds-slack-13.9.0.jar:?]
at org.codelibs.fess.ds.slack.SlackDataStore.lambda$storeData$0(SlackDataStore.java:114) ~[fess-ds-slack-13.9.0.jar:?]
at org.codelibs.fess.ds.slack.SlackClient.getChannels(SlackClient.java:270) ~[fess-ds-slack-13.9.0.jar:?]
at org.codelibs.fess.ds.slack.SlackDataStore.storeData(SlackDataStore.java:113) ~[fess-ds-slack-13.9.0.jar:?]
at org.codelibs.fess.ds.AbstractDataStore.store(AbstractDataStore.java:111) ~[classes/:?]
at org.codelibs.fess.helper.DataIndexHelper$DataCrawlingThread.process(DataIndexHelper.java:216) [classes/:?]
at org.codelibs.fess.helper.DataIndexHelper$DataCrawlingThread.run(DataIndexHelper.java:202) [classes/:?]
2021-01-29 11:39:02,923 [2AtwQncBEGZyDcBMreIU-1] INFO Sent 9 docs (Doc:{process 313ms, send 370ms, size 22KB}, Mem:{used 152MB, heap 986MB, max 2GB})
可能な原因は何でしょうか?