View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0000863 | savapage-server | [All Projects] General | public | 2017-09-08 19:34 | 2018-04-30 16:11 |
| Reporter | rijkr | Assigned To | rijkr | ||
| Priority | normal | Severity | minor | Reproducibility | sometimes |
| Status | closed | Resolution | fixed | ||
| Platform | VMware | OS | RHES | OS Version | |
| Product Version | 0.9.12 | ||||
| Target Version | 1.0.0 | Fixed in Version | 1.0.0 | ||
| Summary | 0000863: Prevent race condition for read/write of savapage.json | ||||
| Description | IST: Sometimes, a "com.fasterxml.jackson.core.JsonParseException: Unexpected end-of-input in field name" is encountered when reading a user's savapage.json file. This indicates that the file is incomplete, which could be due to a read/write "race condition". For example, after a PDF upload, the UserEventService gets a notification from the Linux file system of the newly created PDF, and immediately reads the PDF meta data from the savapage.json file, while at the same time the same json file is being written by another thread. SOLL: Create savapage.json as temp file and do atomic move to target location. NOTE: This issue was observed on VMware with an extra mounted disk (XFS File System) dedicated for temporary files and user inboxes. | ||||
| Additional Information | 2017-09-07 14:56:23,468 ERROR UserEventService:559 - Error parsing from file [/opt/spool/savapage/safepages/0/1/some-userid/savapage.json] [jetty-threadpool-4604] org.savapage.core.SpException: Error parsing from file [/opt/spool/savapage/safepages/0/1/some-userid/savapage.json] at org.savapage.core.services.impl.InboxServiceImpl.readInboxInfo(InboxServiceImpl.java:191) at org.savapage.core.services.impl.InboxServiceImpl.getInboxInfo(InboxServiceImpl.java:244) at org.savapage.core.services.helpers.InboxPageImageChunker.<init>(InboxPageImageChunker.java:212) at org.savapage.core.services.helpers.InboxPageImageChunker.chunk(InboxPageImageChunker.java:663) at org.savapage.core.services.impl.InboxServiceImpl.getPageChunks(InboxServiceImpl.java:754) at org.savapage.server.cometd.UserEventService.getChangedJobsEvent(UserEventService.java:1031) at org.savapage.server.cometd.UserEventService.watchUserFileEvents(UserEventService.java:897) at org.savapage.server.cometd.UserEventService.monitorUserEvent(UserEventService.java:518) . . . Caused by: com.fasterxml.jackson.core.JsonParseException: Unexpected end-of-input in field name at [Source: /opt/spool/savapage/safepages/0/1/some-userid/savapage.json; line: 168, column: 4010] at com.fasterxml.jackson.core.JsonParser._constructError(JsonParser.java:1378) . . . at org.savapage.core.services.impl.InboxServiceImpl.readInboxInfo(InboxServiceImpl.java:171) ... 32 more 2017-09-07 14:56:23,473 ERROR AppLogServiceImpl:121 - UserEventService: SpException: Error parsing from file [/opt/spool/savapage/safepages/0/1/some-userid/savapage.json] (User "some-userid" at WebApp 127.0.0.1) [jetty-threadpool-4604] | ||||
| Tags | No tags attached. | ||||
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2017-09-08 19:34 | rijkr | New Issue | |
| 2017-09-08 19:34 | rijkr | Status | new => assigned |
| 2017-09-08 19:34 | rijkr | Assigned To | => rijkr |
| 2017-09-08 19:37 | rijkr | OS | => RHES |
| 2017-09-08 19:37 | rijkr | Platform | => VMware |
| 2017-09-08 20:11 | rijkr | Description Updated | View Revisions |
| 2017-09-08 20:34 | rijkr | Description Updated | View Revisions |
| 2017-09-08 20:34 | rijkr | Additional Information Updated | View Revisions |
| 2017-10-23 14:49 | rijkr | Status | assigned => resolved |
| 2017-10-23 14:49 | rijkr | Resolution | open => fixed |
| 2017-10-23 14:49 | rijkr | Fixed in Version | => 1.0.0 |
| 2018-04-30 16:11 | rijkr | Status | resolved => closed |
