使用Java SAP Cloud SDK版本3.9.0
我们有一个代码片段，用于从S / 4读取外向交货项目，如下所示：
List<OutbDeliveryItem> items = new DefaultOutboundDeliveryV2Service()
.getAllOutbDeliveryItem()
.filter(OutbDeliveryItem.DELIVERY_DOCUMENT.eq("someDocument"))
.execute(someDestination);
该代码成功执行，并且能够从S / 4中读取项目。但是下面的异常总是被记录：
ERROR com.sap.cloud.sdk.odatav2.connectivity.cache.metadata.GuavaMetadataCache - Error occurred while populating metadata:
com.sap.cloud.sdk.datamodel.odata.helper.ODataVdmErrorResultHandler$ErpODataException: The endpoint responded with HTTP error code 401.
Logon failed. 401 Not authorized.
Full error message:
<html><head><meta http-equiv="content-type" content="text/html; charset=windows-1252"><title>Logon failed</title><style>body { background: #ffffff; text-align:
center; width:100%; height:100%; overflow:hidden; }.content { display: table; position:absolute; width:100%; height:80%; }.valigned { display: table-cell; vertical-align: middle; }.lowerCenter { display: table-
cell; vertical-align: bottom; }.footer { position: absolute; bottom: 0; left: 0; width: 100%; z-index: -1; }.footerLeft { float: left; margin-left: 20px; }.footerRight { float: right; margin-right: 20px; positio
n: absolute; bottom: 0px; right: 0px; }.centerText { font-style: normal; font-family: Arial; font-size: 26px; color: #444444; z-index: 1; }.errorTextHeader { font-style: normal; font-family: Arial; font-size: 40
px; color: #444444; }.bottomText { align: center; font-style: normal; font-family: Arial; font-size: 14px; color: #444444; }.biggerBottomText { align: center; font-style: normal; font-family: Arial; font-size: 1
6px; color: #444444; }.detailTable { align: bottom; vertical-align: middle; margin-left:auto; margin-right:auto; font-style: normal; font-family: Arial; font-size: 16px; color: #444444; }</style></head><body><di
v class="content"><div class="valigned"><p class="centerText"><span class="errorTextHeader"> 401 Not authorized </span></p></div></div><div class="footer"><div class="footerLeft"><img width='150' height='80' tit
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at com.sap.cloud.sdk.datamodel.odata.helper.ODataVdmErrorResultHandler.createException(ODataVdmErrorResultHandler.java:117)
at com.sap.cloud.sdk.datamodel.odata.helper.ODataVdmErrorResultHandler.createError(ODataVdmErrorResultHandler.java:97)
at com.sap.cloud.sdk.datamodel.odata.helper.ODataVdmErrorResultHandler.createError(ODataVdmErrorResultHandler.java:33)
at com.sap.cloud.sdk.odatav2.connectivity.internal.ODataConnectivityUtil.checkHttpStatus(ODataConnectivityUtil.java:219)
at com.sap.cloud.sdk.odatav2.connectivity.cache.metadata.GuavaMetadataCache.getEdm(GuavaMetadataCache.java:239)
at com.sap.cloud.sdk.odatav2.connectivity.cache.metadata.GuavaMetadataCache.getEdm(GuavaMetadataCache.java:156)
at com.sap.cloud.sdk.odatav2.connectivity.ODataQuery.loadMetadata(ODataQuery.java:379)
at com.sap.cloud.sdk.odatav2.connectivity.ODataQuery.loadEntriesFromDestination(ODataQuery.java:310)
at com.sap.cloud.sdk.odatav2.connectivity.ODataQuery.internalExecute(ODataQuery.java:253)
at com.sap.cloud.sdk.odatav2.connectivity.ODataQuery.execute(ODataQuery.java:151)
at com.sap.cloud.sdk.odatav2.connectivity.ODataQuery.execute(ODataQuery.java:135)
at com.sap.cloud.sdk.datamodel.odata.helper.FluentHelperRead.execute(FluentHelperRead.java:250)
我检查了Cloud Foundry上的目标设置以及云连接器上的设置。设置正确。如果设置有问题，则代码将无法从S / 4中读取项目。
在稍微调试了sdk代码后，我发现了一个方法com.sap.cloud.sdk.odatav2.connectivity.OdataQuery.execute()，想执行两次读取请求。第一次读取失败，因为代码无法获取元数据，并引发了我之前在问题中提到的异常。第二次读取成功（代码能够读取元数据）。我本可以从sdk粘贴代码片段，但不确定这样做是否合适。
我有以下问题：
- 我的代码有问题吗？（我想不是，因为它能够从S / 4中读取项目）。如果有什么问题，那是什么？
- 这是SDK中的错误吗？如果是，那么什么时候可以解决？
- 如果这是sdk的内部功能，我不应该担心，那么如何停止记录此异常？我必须摆脱错误日志，因为它将在我们的生产系统中生成错误警报。
如果您需要更多信息，请告诉我。
PS：我在这个博客上看到了很多面临相同问题的人的评论。
