我有一个quickfix .net应用程序。我正在使用.net/c++ version of quickfix
有时我的应用程序抛出此错误，而我无法使用try catch块捕获它。
修复消息的长度大约为3000。我不会每次都收到此错误。
这是事件日志：
框架版本：v4.0.30319说明：进程已终止
由于未处理的异常。异常信息：
System.AccessViolationException堆栈：在
System.String..ctor（SByte *）位于
在以下位置的QuickFix.Group.getField（QuickFix.StringField）
FixApplication.onMessage（QuickFix44.MarketDataIncrementalRefresh，
QuickFix.SessionID）
QuickFix44.MessageCracker.crack（QuickFix.Message，QuickFix.SessionID）
在QuickFix.MessageCracker.crack（QuickFix.Message，QuickFix.SessionID，
QuickFix.BeginString）在
QuickFix.MessageCracker.crack（QuickFix.Message，QuickFix.SessionID）
在FixApplication.fromApp（QuickFix.Message，
位于.Application.fromApp（Application *，
FIX.Message *，FIX.SessionID *）
引发错误的行：
public override void onMessage(QuickFix44.MarketDataIncrementalRefresh msg, SessionID sessionID)
{
try
{
var mdReqId = new MDReqID();
if (msg.isSet(mdReqId))
msg.get(mdReqId);
var noMdEntries = new NoMDEntries();
if (msg.isSet(noMdEntries))
msg.get(noMdEntries);
int noMdEntriesInt;
if (Int32.TryParse(noMdEntries.ToString(), out noMdEntriesInt))
{
for (uint i = 1; i <= noMdEntriesInt; i++)
{
var group = new MarketDataIncrementalRefresh.NoMDEntries();
Group repeatedData;
if (msg.isSet(noMdEntries))
{
repeatedData = msg.getGroup(i, group);
var mdUpdateAction = new MDUpdateAction();
if (repeatedData.isSetField(mdUpdateAction))
repeatedData.getField(mdUpdateAction);
var mdEntryType = new MDEntryType();
if (repeatedData.isSetField(mdEntryType))
repeatedData.getField(mdEntryType);
var symbol = new Symbol();
if (repeatedData.isSetField(symbol))
repeatedData.getField(symbol);
var mdEntryPx = new MDEntryPx();
if (repeatedData.isSetField(mdEntryPx))
repeatedData.getField(mdEntryPx);
var mdEntrySize = new MDEntrySize();
if (repeatedData.isSetField(mdEntrySize))
repeatedData.getField(mdEntrySize);
var numberOfOrders = new NumberOfOrders();
if (repeatedData.isSetField(numberOfOrders))
repeatedData.getField(numberOfOrders);
var mdEntryPositionNo = new MDEntryPositionNo();
if (repeatedData.isSetField(mdEntryPositionNo))
repeatedData.getField(mdEntryPositionNo);
var quoteCondition = new QuoteCondition();
if (repeatedData.isSetField(quoteCondition))
repeatedData.getField(quoteCondition);
var sysSymbolId = 0;
var mdEntryId = new MDEntryID();
if (repeatedData.isSetField(mdEntryId))
{
repeatedData.getField(mdEntryId);//THIS LINE THROWS ERROR
string strMdEntryId = mdEntryId.getValue();
}
//}
}
}
}
}
Functions.WriteDebugLog("OK");
}
catch (Win32Exception e)
{
Functions.WriteSystemLog("Ex Msg:" + e.ToString() + " Fix Msg : " + msg.ToString());
}
catch (Exception ex)
{
Functions.WriteSystemLog("Ex Msg:" + ex.ToString() + " Fix Msg : " + msg.ToString());
}
}
这是修复消息（您可以使用此在线工具http://fixloganalyzer.com/进行解析）：
8 = FIX.4.4 | 9 = 2254 | 35 = X | 34 = 21998 | 49 = * | 50 = * | 52 = 20140411-07：52：52.472 | 56 = ** | 262 = 1397202772472 | 268 = 42 | 279 = 1 | 278 = 25500 | 270 = 2.11636 | 271 = 3500000 | 276 = A | 290 = 1 | 279 = 1 | 278 = 25501 | 270 = 2.11626 | 271 = 2000000 | 276 = A | 290 = 2 | 279 = 1 | 278 = 25502 | 270 = 2.11616 | 271 = 3000000 | 276 = A | 290 = 3 | 279 = 1 | 278 = 25504 | 270 = 2.11596 | 271 = 7000000 | 276 = A | 290 = 5 | 279 = 1 | 278 = 25510 | 270 = 2.11716 | 271 = 3500000 | 276 = A | 290 = 1 | 279 = 1 | 278 = 25512 | 270 = 2.11736 | 271 = 5000000 | 276 = A | 290 = 3 | 279 = 1 | 278 = 25513 | 270 = 2.11746 | 271 = 5000000 | 276 = A | 290 = 4 | 279 = 1 | 278 = 25514 | 270 = 2.11756 | 271 = 6000000 | 276 = A | 290 = 5 | 279 = 1 | 278 = 204 | 270 = 1.38947 | 271 = 1500000 | 276 = A | 290 = 5 | 279 = 1 | 278 = 600 | 270 = 0.93834 | 271 = 1000000 | 276 = A | 290 = 1 | 279 = 1 | 278 = 601 | 270 = 0.93833 | 271 = 1000000 | 276 = A | 290 = 2 | 279 = 1 | 278 = 602 | 270 = 0.93832 | 271 = 1000000 | 276 = A | 290 = 3 | 279 = 1 | 278 = 603 | 270 = 0.93831 | 271 = 2000000 | 276 = A | 290 = 4 | 279 = 1 | 278 = 604 | 270 = 0.93821 | 271 = 2000000 | 276 = A | 290 = 5 | 279 = 1 | 278 = 610 | 270 = 0.93839 | 271 = 1000000 | 276 = A | 290 = 1 | 279 = 1 | 278 = 611 | 270 = 0.9384 | 271 = 1500000 | 276 = A | 290 = 2 | 279 = 1 | 278 = 613 | 270 = 0.93843 | 271 = 3500000 | 276 = A | 290 = 4 | 279 = 1 | 278 = 614 | 270 = 0.93844 | 271 = 3000000 | 276 = A | 290 = 5 | 279 = 1 | 278 = 2200 | 270 = 1.09337 | 271 = 1000000 | 276 = A | 290 = 1 | 279 = 1 | 278 = 2201 | 270 = 1.09336 | 271 = 1000000 | 276 = A | 290 = 2 | 279 = 1 | 278 = 2203 | 270 = 1.09334 | 271 = 4000000 | 276 = A | 290 = 4 | 279 = 1 | 278 = 2204 | 270 = 1.09333 | 271 = 1000000 | 276 = A | 290 = 5 | 279 = 1 | 278 = 2211 | 270 = 1.09344 | 271 = 2000000 | 276 = A | 290 = 2 | 279 = 1 | 278 = 2214 | 270 = 1.09356 | 271 = 3000000 | 276 = A | 290 = 5 | 279 = 1 | 278 = 19600 | 270 = 1.08182 | 271 = 1000000 | 276 = A | 290 = 1 | 279 = 1 | 278 = 19601 | 270 = 1.08181 | 271 = 1000000 | 276 = A | 290 = 2 | 279 = 1 | 278 = 19602 | 270 = 1.0818 | 271 = 1000000 | 276 = A | 290 = 3 | 279 = 1 | 278 = 19603 | 270 = 1.08179 | 271 = 1000000 | 276 = A | 290 = 4 | 279 = 1 | 278 = 19604 | 270 = 1.08178 | 271 = 1000000 | 276 = A | 290 = 5 | 279 = 1 | 278 = 19612 | 270 = 1.08205 | 271 = 1000000 | 276 = A | 290 = 3 | 279 = 1 | 278 = 19613 | 270 = 1.08206 | 271 = 1000000 | 276 = A | 290 = 4 | 279 = 1 | 278 = 19614 | 270 = 1.08216 | 271 = 2000000 | 276 = A | 290 = 5 | 279 = 1 | 278 = 23600 | 270 = 1.51927 | 271 = 2000000 | 276 = A | 290 = 1 | 279 = 1 | 278 = 23601 | 270 = 1.51926 | 271 = 1000000 | 276 = A | 290 = 2 | 279 = 1 | 278 = 23602 | 270 = 1.51925 | 271 = 1000000 | 276 = A | 290 = 3 | 279 = 1 | 278 = 23603 | 270 = 1.51915 | 271 = 3000000 | 276 = A | 290 = 4 | 279 = 1 | 278 = 23604 | 270 = 1.51905 | 271 = 4000000 | 276 = A | 290 = 5 | 279 = 1 | 2 78 = 23610 | 270 = 1.51945 | 271 = 1500000 | 276 = A | 290 = 1 | 279 = 1 | 278 = 23611 | 270 = 1.51946 | 271 = 1000000 | 276 = A | 290 = 2 | 279 = 1 | 278 = 23612 | 270 = 1.51947 | 271 = 1000000 | 276 = A | 290 = 3 | 279 = 1 | 278 = 23613 | 270 = 1.51957 | 271 = 2000000 | 276 = A | 290 = 4 | 279 = 1 | 278 = 23614 | 270 = 1.51967 | 271 = 3000000 | 276 = A | 290 = 5 | 10 = 142 |
最佳答案
This看起来很相关。
这是关于Group对象中的竞争条件，该条件在引用之前先收集垃圾。
您需要像gcnew这样的内容：.Net garbage collection