错误笔记：Caused by: java.lang.StackOverflowError

2023-04-26 23:30•java•阅读 1115

今天在将一个map转化成json出现堆栈异常，排查原因如下：出现循环递归( rootMap.put("rootMap", rootMap);)，栈内存肯定耗光

代码：

/**

* 初始化模板需要的数据每个团队一个key-value key=团队 value = 达成率数组,初始化给前端展示用

* @param weekreportList

* @return Map<String, Object>=Map<team, valueArray>

* @throws Exception

public Map<String, Object> initRootMap(List<WrWeekreport> weekreportList)

throws Exception

{

String chartTitle = "周达成率趋势图";

// key=团队 value = 达成率数组

Map<String, Object> rootMap = new HashMap<String, Object>();

rootMap.put("chartTitle", chartTitle);

// 获取所有团队

String[] teams = getTeamByWeekreportList(weekreportList);

// 获取所有年周

Integer[] yearweeks = getYearWeekByWeekreportList(weekreportList);

// 年周排序

Arrays.sort(yearweeks);

// 1.团队为key

// 2.一个团队一个Key对应一个达成数组

// 3.每个达成数组按团队十年十周配对，其中周要包含1与01两种情况

int teamsLength = teams.length;

// 当前团队

for (int i = 0; i < teamsLength; i++)

{

int[] valueArray = new int[teamsLength];

String team = teams[i];

// 当前周

for (int y = 0; y < yearweeks.length; y++)

{

// 取出当前团队当前周的达成率拼成一个个团队的达成率value数组

for (WrWeekreport wr : weekreportList)

{

// 是当前团队、当前年周

if (team.equalsIgnoreCase(wr.getTeam()) && ywMatch(yearweeks[y], wr.getYearNum(), wr.getWeekNum()))

{

// 将达成率封装到团队的数组中，按周排序

valueArray[y] = wr.getFinishPercentage();

}

// 每个团队一个key-value key=团队 value = 达成率数组,初始化给前端展示用

rootMap.put(team, valueArray);

}

rootMap.put("teams", teams);

rootMap.put("yearweeks", yearweeks);

/**

//就是下面这行代码，map里再次封装自己，所以在进行json递归转换的时候陷入无限循环，去掉就正常了

**/

rootMap.put("rootMap", rootMap);

return rootMap;

}

调用: String teamMapString = JsonUtil.map2json(teamMap);

public static String map2json(Map<?, ?> map)

{

StringBuilder json = new StringBuilder();

json.append("{");

if (map != null && map.size() > 0)

{

for (Object key : map.keySet())

{

json.append(object2json(key));

json.append(":");

json.append(object2json(map.get(key)));

json.append(",");

}

json.setCharAt(json.length() - 1, '}');

}

else

{

json.append("}");

}

return json.toString();

}

jvm错误信息：

# A fatal error has been detected by the Java Runtime Environment:

# EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x0000000064d718c3, pid=10168, tid=10012

# JRE version: Java(TM) SE Runtime Environment (7.0_71-b14) (build 1.7.0_71-b14)

# Java VM: Java HotSpot(TM) 64-Bit Server VM (24.71-b01 mixed mode windows-amd64 compressed oops)

# Problematic frame:

# V [jvm.dll+0x818c3]

# Failed to write core dump. Minidumps are not enabled by default on client versions of Windows

# If you would like to submit a bug report, please visit:

# http://bugreport.sun.com/bugreport/crash.jsp

--------------- T H R E A D ---------------

Current thread (0x000000000fe16800): JavaThread "btpool0-1" [_thread_in_vm, id=10012, stack(0x0000000011c60000,0x0000000011d60000)]

siginfo: ExceptionCode=0xc0000005, reading address 0x0000000000000021

Registers:

RAX=0x00000007d5730630, RBX=0x0000000000000000, RCX=0x0000000000000001, RDX=0x000000000eafaaf8

RSP=0x0000000011c690f0, RBP=0x0000000011c69220, RSI=0x000000000eafaaf8, RDI=0x000000000dfbdee8

R8 =0x00000000101e3710, R9 =0x00000007d5730610, R10=0x0000000000000355, R11=0x0000000011c69900

R12=0x0000000000000000, R13=0x0000000011c69fe8, R14=0x0000000011c6a450, R15=0x000000000fe16800

RIP=0x0000000064d718c3, EFLAGS=0x0000000000010202

Top of Stack: (sp=0x0000000011c690f0)

0x0000000011c690f0: 0000000000000000 0000000064d6fc2c

0x0000000011c69100: 00000000035ae6a0 0000000011c69a70

0x0000000011c69110: 000000000e62ffe0 0000000064e78270

0x0000000011c69120: 000000000dfbdee0 000000000dfbded8

0x0000000011c69130: 0000000011c69220 0000000011c698c0

0x0000000011c69140: 000000000dfbd9e0 0000000011c69a70

0x0000000011c69150: 0000000000000000 0000000064d76406

0x0000000011c69160: 0000000003420100 000000000fe16800

0x0000000011c69170: 0000000011d60000 0000000002838f80

0x0000000011c69180: 00000000032c0170 000000000ff0a6b0

0x0000000011c69190: 0000000011c69db0 000000000f58a640

0x0000000011c691a0: 00000007e5546e70 00000007d5730610

0x0000000011c691b0: 0000000003427300 0000000000000000

0x0000000011c691c0: 000000000e630260 0000000011c61000

0x0000000011c691d0: 00000000032c0170 0000000077b0da9f

0x0000000011c691e0: 0000000011d60000 000000000fe16800

Instructions: (pc=0x0000000064d718c3)

0x0000000064d718a3: ff 15 3f ab 4d 00 48 8b d6 48 8b 88 20 01 00 00

0x0000000064d718b3: e8 88 36 f8 ff 48 8b f8 48 8b 46 10 48 8b 48 20

0x0000000064d718c3: 48 8b 71 20 48 85 f6 74 1e 8b 0d e6 16 68 00 ff

0x0000000064d718d3: 15 10 ab 4d 00 48 8b d6 48 8b 88 20 01 00 00 e8

RAX=0x00000007d5730630 is an oop

[Ljava.lang.Object;

- klass: 'java/lang/Object'[]

- length: 3

RBX=0x0000000000000000 is an unknown value

RCX=0x0000000000000001 is an unknown value

RDX=0x000000000eafaaf8 is an unknown value

RSP=0x0000000011c690f0 is pointing into the stack for thread: 0x000000000fe16800

RBP=0x0000000011c69220 is pointing into the stack for thread: 0x000000000fe16800

RSI=0x000000000eafaaf8 is an unknown value

RDI=0x000000000dfbdee8 is an unknown value

R8 =0x00000000101e3710 is an unknown value

R9 =0x00000007d5730610 is an oop

java.lang.StackOverflowError

- klass: 'java/lang/StackOverflowError'

R10=0x0000000000000355 is an unknown value

R11=0x0000000011c69900 is pointing into the stack for thread: 0x000000000fe16800

R12=0x0000000000000000 is an unknown value

R13=0x0000000011c69fe8 is pointing into the stack for thread: 0x000000000fe16800

R14=0x0000000011c6a450 is pointing into the stack for thread: 0x000000000fe16800

R15=0x000000000fe16800 is a thread

Stack: [0x0000000011c60000,0x0000000011d60000], sp=0x0000000011c690f0, free space=36k

Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)

V [jvm.dll+0x818c3]

V [jvm.dll+0x8650c]

Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)

v ~RuntimeStub::StackOverflowError throw_exception

v ~StubRoutines::call_stub

J 783 java.lang.Class.forName0(Ljava/lang/String;ZLjava/lang/ClassLoader;Ljava/lang/Class;)Ljava/lang/Class; (0 bytes) @ 0x000000000357f3a7 [0x000000000357f320+0x87]

J 795 C2 java.lang.Class.forName(Ljava/lang/String;)Ljava/lang/Class; (15 bytes) @ 0x0000000003368820 [0x00000000033687e0+0x40]

j com.sun.beans.finder.ClassFinder.findClass(Ljava/lang/String;)Ljava/lang/Class;+39

j com.sun.beans.finder.ClassFinder.findClass(Ljava/lang/String;Ljava/lang/ClassLoader;)Ljava/lang/Class;+21

j com.sun.beans.finder.InstanceFinder.instantiate(Ljava/lang/Class;Ljava/lang/String;)Ljava/lang/Object;+13

j com.sun.beans.finder.InstanceFinder.find(Ljava/lang/Class;)Ljava/lang/Object;+34

J 793 C2 java.beans.Introspector.<init>(Ljava/lang/Class;Ljava/lang/Class;I)V (199 bytes) @ 0x0000000003597630 [0x0000000003597300+0x330]

J 781 C2 com.vipshop.util.JsonUtil.object2json(Ljava/lang/Object;)Ljava/lang/String; (219 bytes) @ 0x00000000035b0ea8 [0x00000000035af2a0+0x1c08]

J 781 C2 com.vipshop.util.JsonUtil.object2json(Ljava/lang/Object;)Ljava/lang/String; (219 bytes) @ 0x00000000035b0574 [0x00000000035af2a0+0x12d4]