What may be the reason of "Unexpected end-of-input in VALUE_STRING" error

Question

I developed a software and it was running properly until my mysql server crashed. After crash, I formatted my server, then installed everything I needed same as good old days. After formatting all softwares seems running properly, but the software I developed started to give some errors. Some of my columns in database are JSON. Normally I get all information from that column, modify it then restore it. Unfortunately after formatting I get this error:

2020-02-25 14:04:25.947  WARN 12528 --- [io-8443-exec-10] .w.s.m.s.DefaultHandlerExceptionResolver : Resolved [org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: Unexpected end-of-input in VALUE_STRING; nested exception is com.fasterxml.jackson.databind.JsonMappingException: Unexpected end-of-input in VALUE_STRING at [Source: (PushbackInputStream); line: 1, column: 15939] (through reference chain: com.bWS.entity.kk.MyEntity["hatalar"])]

I didn't change anything from software, so it is not possible that my JSON data is invalid. In addition this error appears randomly, I mean for example in first try this error appears but second try everything works great. Especially if data length become longer, this error appears more frequently.

I need help to understand what the reason is.

Thank you all.

The system:

Ubuntu 18.04
MySQL 8.0.19 (I tried with 5.7 too)
OpenJDK 11.0.6
Tomcat 9

The Softwares: Java/Spring web applications(Client+Web Service)

EDIT

Sample Data:

{
    "id": 824,
    "gId": 4904,
    "eK": "https://algoritimbilisim.com",
    "tarih": "2020-02-25",
    "hatalar": {
        "periyot": [
            {
                "aralik": "10:00-11:00",
                "adi": [
                    {
                        "deger": "YOK",
                        "kalite": "1",
                        "hataKodlari": []
                    },
                    {
                        "deger": "YOK",
                        "kalite": "1",
                        "hataKodlari": []
                    }
                ]
            }
        ]
    }
}

Give an example of the input from the database you are trying to parse it usually input size issue — asfmlr, Feb 25 '20 at 12:37
Please [edit] your question to include the details you posted in your comment. It helps to keep our Q&A style tidy and could also bring more attention since an edited question gets bounced on the homepage. See also [How do comments work?](https://meta.stackexchange.com/q/19756/217657) — Melebius, Mar 04 '20 at 10:20
Removing `Content-Length` header This solved the problem https://stackoverflow.com/a/36721932/944593 — shareef, Jul 04 '22 at 12:15

score 4 · Accepted Answer · edited Mar 18 '20 at 15:44

4

Since you mentioned using Tomcat 9, attempting to share my recent experience.

Recently I ran into similar issue. When upgraded to Tomcat 9.0.31, one of my test case which does a POST of a large JSON (little less than 2 MB) started failing randomly with:

JSON parse error: Unexpected end-of-input in VALUE_STRING; nested exception is com.fasterxml.jackson.databind.JsonMappingException: Unexpected end-of-input in VALUE_STRING at [Source: (PushbackInputStream); line: 1, column: 17] (through reference chain: com.abc.xyz ["str"]) - JSON parse error: Unexpected end-of-input in VALUE_STRING; nested exception is com.fasterxml.jackson.databind.JsonMappingException: Unexpected end-of-input in VALUE_STRING at [Source: (PushbackInputStream); line: 1, column: 17] (through reference chain: com.abc.xyz["str"]) at

Turns out that there was a bug in Tomcat 9.0.31 which caused this.

https://bz.apache.org/bugzilla/show_bug.cgi?id=64202

Moving to Tomcat 9.0.33 solved my issue.

Are you also using Tomcat 9.0.31?

edited Mar 18 '20 at 15:44

Dharman

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answered Mar 18 '20 at 10:50

Amit Pande

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Thanks for reply. Yes I use Tomcat 9.0.31 in server and in a normal machine. In server problem appears whereas in the normal machine there is no problem. If this is a bug, it seems it is very erratic. Same bug reported from another person, that report gave me a solution which seems to work properly(I will update after further trials). He says: "Running against Http11Nio2Protocol works fine, running against Http11NioProtocol fails most of the time." https://bz.apache.org/bugzilla/show_bug.cgi?id=64195 – a.akkus Mar 19 '20 at 05:50
According to my experiences protocol change (Http11Nio2Protocol instead of Http11NioProtocol) is useful solution like updating Tomcat. – a.akkus Apr 03 '20 at 05:19
upgrading the tomcat version resolved my problem. Thank you. – Sayed Uz Zaman Oct 14 '20 at 07:34

What may be the reason of "Unexpected end-of-input in VALUE_STRING" error

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