java.lang.NullPointerException: null value

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NPE when adding attachments without comments

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'tryPublishEvent Failed to publish confluence.start event java.lang.NullPointerException: null value' error thrown during Confluence startup running on Oracle Datbase

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[CONF-38754] 'tryPublishEvent Failed to publish confluence.start event java.lang.NullPointerException: null value' error thrown during Confluence startup running on Oracle Datbase - Atlassian JIRA

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'tryPublishEvent Failed to publish confluence.start event java.lang.NullPointerException: null value' error thrown during Confluence startup running on Oracle Datbase

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java.lang.NullPointerException: null value	at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:204)	at com.google.common.collect.ImmutableMap.entryOf(ImmutableMap.java:139)	at com.google.common.collect.ImmutableMap.of(ImmutableMap.java:85)	at com.atlassian.confluence.api.impl.service.content.factory.AttachmentFactory.buildFrom(AttachmentFactory.java:32)	at com.atlassian.confluence.api.impl.service.content.AttachmentServiceImpl.addOrUpdateAttachment(AttachmentServiceImpl.java:283)	at com.atlassian.confluence.api.impl.service.content.AttachmentServiceImpl.addAttachments(AttachmentServiceImpl.java:85)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)