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please try againinclude error,path:/comp/news/list?compId=news_list-15103887578634576 cause:org。springframework。web。util。NestedServletException: Request processing failed; nested exception is java。lang。RuntimeException: org。springframework。dao。TransientDataAccessResourceException: ### Error querying database。 Cause: java。sql。SQLException: Could not retrieve transation read-only status server ### The error may exist in URL [jar:file:/data/java_webdir/sc-site-1。0。0-SNAPSHOT_2019-06-04-14-42-44/lib/service-info-provider-1。0。0-SNAPSHOT。jar!/mybatis/InfoCategoryMapper。xml] ### The error may involve defaultParameterMap ### The error occurred while setting parameters ### SQL: /*!mycat:datanode=SITE_74765 */SELECT c。ID,c。NAME,c。TYPE,c。LINK_URL,c。SHOW_STYLE,c。PARENT_ID, c。MOBILE_LINK_URL,c。MOBILE_SHOW_STYLE FROM INFO_CATEGORY c INNER JOIN INFO_CATEGORY_INFO ic ON c。ID = ic。ID WHERE ic。INFO_ID=? ORDER BY ic。SHOW_ORDER ASC LIMIT 1 ### Cause: java。sql。SQLException: Could not retrieve transation read-only status server ; SQL []; Could not retrieve transation read-only status server; nested exception is java。sql。SQLException: Could not retrieve transation read-only status server org。springframework。dao。TransientDataAccessResourceException: ### Error querying database。 Cause: java。sql。SQLException: Could not retrieve transation read-only status server ### The error may exist in URL [jar:file:/data/java_webdir/sc-site-1。0。0-SNAPSHOT_2019-06-04-14-42-44/lib/service-info-provider-1。0。0-SNAPSHOT。jar!/mybatis/InfoCategoryMapper。xml] ### The error may involve defaultParameterMap ### The error occurred while setting parameters ### SQL: /*!mycat:datanode=SITE_74765 */SELECT c。ID,c。NAME,c。TYPE,c。LINK_URL,c。SHOW_STYLE,c。PARENT_ID, c。MOBILE_LINK_URL,c。MOBILE_SHOW_STYLE FROM INFO_CATEGORY c INNER JOIN INFO_CATEGORY_INFO ic ON c。ID = ic。ID WHERE ic。INFO_ID=? ORDER BY ic。SHOW_ORDER ASC LIMIT 1 ### Cause: java。sql。SQLException: Could not retrieve transation read-only status server ; SQL []; Could not retrieve transation read-only status server; nested exception is java。sql。SQLException: Could not retrieve transation read-only status server at org。springframework。jdbc。support。SQLStateSQLExceptionTranslator。doTranslate(SQLStateSQLExceptionTranslator。java:108) at org。springframework。jdbc。support。AbstractFallbackSQLExceptionTranslator。translate(AbstractFallbackSQLExceptionTranslator。java:73) at org。springframework。jdbc。support。AbstractFallbackSQLExceptionTranslator。translate(AbstractFallbackSQLExceptionTranslator。java:81) at org。springframework。jdbc。support。AbstractFallbackSQLExceptionTranslator。translate(AbstractFallbackSQLExceptionTranslator。java:81) at org。mybatis。spring。MyBatisExceptionTranslator。translateExceptionIfPossible(MyBatisExceptionTranslator。java:71) at org。mybatis。spring。SqlSessionTemplate$SqlSessionInterceptor。invoke(SqlSessionTemplate。java:364) at com。sun。proxy。$Proxy30。selectList(Unknown Source) at org。mybatis。spring。SqlSessionTemplate。selectList(SqlSessionTemplate。java:194) at org。apache。ibatis。binding。MapperMethod。executeForMany(MapperMethod。java:119) at org。apache。ibatis。binding。MapperMethod。execute(MapperMethod。java:63) at org。apache。ibatis。binding。MapperProxy。invoke(MapperProxy。java:52) at com。sun。proxy。$Proxy152。findByFrontPagination(Unknown Source) at cn。ce。ebiz。info。service。impl。InfoServiceImpl。findByFrontPagination(InfoServiceImpl。java:541) at sun。reflect。GeneratedMethodAccessor430。invoke(Unknown Source) at sun。reflect。DelegatingMethodAccessorImpl。invoke(DelegatingMethodAccessorImpl。java:43) at java。lang。reflect。Method。invoke(Method。java:606) at org。springframework。aop。support。AopUtils。invokeJoinpointUsingReflection(AopUtils。java:333) at org。springframework。aop。framework。ReflectiveMethodInvocation。invokeJoinpoint(ReflectiveMethodInvocation。java:190) at org。springframework。aop。framework。ReflectiveMethodInvocation。proceed(ReflectiveMethodInvocation。java:157) at org。springframework。transaction。interceptor。TransactionInterceptor$1。proceedWithInvocation(TransactionInterceptor。java:99) at org。springframework。transaction。interceptor。TransactionAspectSupport。invokeWithinTransaction(TransactionAspectSupport。java:280) at org。springframework。transaction。interceptor。TransactionInterceptor。invoke(TransactionInterceptor。java:96) at org。springframework。aop。framework。ReflectiveMethodInvocation。proceed(ReflectiveMethodInvocation。java:179) at org。springframework。aop。interceptor。ExposeInvocationInterceptor。invoke(ExposeInvocationInterceptor。java:92) at org。springframework。aop。framework。ReflectiveMethodInvocation。proceed(ReflectiveMethodInvocation。java:179) at org。springframework。aop。framework。JdkDynamicAopProxy。invoke(JdkDynamicAopProxy。java:213) at com。sun。proxy。$Proxy162。findByFrontPagination(Unknown Source) at com。alibaba。dubbo。common。bytecode。Wrapper102。invokeMethod(Wrapper102。java) at com。alibaba。dubbo。rpc。proxy。javassist。JavassistProxyFactory$1。doInvoke(JavassistProxyFactory。java:45) at com。alibaba。dubbo。rpc。proxy。AbstractProxyInvoker。invoke(AbstractProxyInvoker。java:71) at com。alibaba。dubbo。config。invoker。DelegateProviderMetaDataInvoker。invoke(DelegateProviderMetaDataInvoker。java:48) at com。alibaba。dubbo。rpc。protocol。InvokerWrapper。invoke(InvokerWrapper。java:52) at cn。ce。ebiz。framework。remoting。DubboContextFilter。invoke(DubboContextFilter。java:220) at com。alibaba。dubbo。rpc。protocol。ProtocolFilterWrapper$1。invoke(ProtocolFilterWrapper。java:68) at com。alibaba。dubbo。rpc。filter。ExceptionFilter。invoke(ExceptionFilter。java:61) at com。alibaba。dubbo。rpc。protocol。ProtocolFilterWrapper$1。invoke(ProtocolFilterWrapper。java:68) at com。alibaba。dubbo。rpc。filter。TimeoutFilter。invoke(TimeoutFilter。java:41) at com。alibaba。dubbo。rpc。protocol。ProtocolFilterWrapper$1。invoke(ProtocolFilterWrapper。java:68) at com。alibaba。dubbo。monitor。support。MonitorFilter。invoke$original$pr7KN1Uo(MonitorFilter。java:74) at com。alibaba。dubbo。monitor。support。MonitorFilter。invoke$original$pr7KN1Uo$accessor$QIPx16Un(MonitorFilter。java) at com。alibaba。dubbo。monitor。support。MonitorFilter$auxiliary$e0CPC5V7。call(Unknown Source) at org。apache。skywalking。apm。agent。core。plugin。interceptor。enhance。InstMethodsInter。intercept(InstMethodsInter。java:93) at com。alibaba。dubbo。monitor。support。MonitorFilter。invoke(MonitorFilter。java) at com。alibaba。dubbo。rpc。protocol。ProtocolFilterWrapper$1。invoke(ProtocolFilterWrapper。java:68) at com。alibaba。dubbo。rpc。protocol。dubbo。filter。TraceFilter。invoke(TraceFilter。java:77) at com。alibaba。dubbo。rpc。protocol。ProtocolFilterWrapper$1。invoke(ProtocolFilterWrapper。java:68) at com。alibaba。dubbo。rpc。filter。ContextFilter。invoke(ContextFilter。java:71) at com。alibaba。dubbo。rpc。protocol。ProtocolFilterWrapper$1。invoke(ProtocolFilterWrapper。java:68) at com。alibaba。dubbo。rpc。filter。GenericFilter。invoke(GenericFilter。java:131) at com。alibaba。dubbo。rpc。protocol。ProtocolFilterWrapper$1。invoke(ProtocolFilterWrapper。java:68) at com。alibaba。dubbo。rpc。filter。ClassLoaderFilter。invoke(ClassLoaderFilter。java:37) at com。alibaba。dubbo。rpc。protocol。ProtocolFilterWrapper$1。invoke(ProtocolFilterWrapper。java:68) at com。alibaba。dubbo。rpc。filter。EchoFilter。invoke(EchoFilter。java:37) at com。alibaba。dubbo。rpc。protocol。ProtocolFilterWrapper$1。invoke(ProtocolFilterWrapper。java:68) at com。alibaba。dubbo。rpc。protocol。dubbo。DubboProtocol$1。reply(DubboProtocol。java:98) at com。alibaba。dubbo。remoting。exchange。support。header。HeaderExchangeHandler。handleRequest(HeaderExchangeHandler。java:96) at com。alibaba。dubbo。remoting。exchange。support。header。HeaderExchangeHandler。received(HeaderExchangeHandler。java:168) at com。alibaba。dubbo。remoting。transport。DecodeHandler。received(DecodeHandler。java:50) at com。alibaba。dubbo。remoting。transport。dispatcher。ChannelEventRunnable。run(ChannelEventRunnable。java:79) at java。util。concurrent。ThreadPoolExecutor。runWorker(ThreadPoolExecutor。java:1145) at java。util。concurrent。ThreadPoolExecutor$Worker。run(ThreadPoolExecutor。java:615) at java。lang。Thread。run(Thread。java:745) Caused by: java。sql。SQLException: Could not retrieve transation read-only status server at com。mysql。jdbc。SQLError。createSQLException(SQLError。java:1078) at com。mysql。jdbc。SQLError。createSQLException(SQLError。java:989) at com。mysql。jdbc。SQLError。createSQLException(SQLError。java:975) at com。mysql。jdbc。SQLError。createSQLException(SQLError。java:920) at com。mysql。jdbc。SQLError。createSQLException(SQLError。java:951) at com。mysql。jdbc。SQLError。createSQLException(SQLError。java:941) at com。mysql。jdbc。ConnectionImpl。isReadOnly(ConnectionImpl。java:3936) at com。mysql。jdbc。ConnectionImpl。isReadOnly(ConnectionImpl。java:3907) at com。mysql。jdbc。PreparedStatement。checkReadOnlySafeStatement(PreparedStatement。java:1258) at com。mysql。jdbc。PreparedStatement。execute$original$iGhi6Yli(PreparedStatement。java:1278) at com。mysql。jdbc。PreparedStatement。execute$original$iGhi6Yli$accessor$qvKdHbDR(PreparedStatement。java) at com。mysql。jdbc。PreparedStatement$auxiliary$ZUAr4vW4。call(Unknown Source) at org。apache。skywalking。apm。agent。core。plugin。interceptor。enhance。InstMethodsInter。intercept(InstMethodsInter。java:93) at com。mysql。jdbc。PreparedStatement。execute(PreparedStatement。java) at com。mchange。v2。c3p0。impl。NewProxyPreparedStatement。execute(NewProxyPreparedStatement。java:989) at org。apache。ibatis。executor。statement。PreparedStatementHandler。query(PreparedStatementHandler。java:59) at org。apache。ibatis。executor。statement。RoutingStatementHandler。query(RoutingStatementHandler。java:73) at sun。reflect。GeneratedMethodAccessor200。invoke(Unknown Source) at sun。reflect。DelegatingMethodAccessorImpl。invoke(DelegatingMethodAccessorImpl。java:43) at java。lang。reflect。Method。invoke(Method。java:606) at org。apache。ibatis。plugin。Plugin。invoke(Plugin。java:62) at com。sun。proxy。$Proxy583。query(Unknown Source) at org。apache。ibatis。executor。SimpleExecutor。doQuery(SimpleExecutor。java:60) at org。apache。ibatis。executor。BaseExecutor。queryFromDatabase(BaseExecutor。java:267) at org。apache。ibatis。executor。BaseExecutor。query(BaseExecutor。java:137) at org。apache。ibatis。executor。CachingExecutor。query(CachingExecutor。java:96) at org。apache。ibatis。executor。loader。ResultLoader。selectList(ResultLoader。java:81) at org。apache。ibatis。executor。loader。ResultLoader。loadResult(ResultLoader。java:70) at org。apache。ibatis。executor。resultset。DefaultResultSetHandler。getNestedQueryMappingValue(DefaultResultSetHandler。java:619) at org。apache。ibatis。executor。resultset。DefaultResultSetHandler。getPropertyMappingValue(DefaultResultSetHandler。java:383) at org。apache。ibatis。executor。resultset。DefaultResultSetHandler。applyPropertyMappings(DefaultResultSetHandler。java:367) at org。apache。ibatis。executor。resultset。DefaultResultSetHandler。getRowValue(DefaultResultSetHandler。java:341) at org。apache。ibatis。executor。resultset。DefaultResultSetHandler。handleRowValuesForSimpleResultMap(DefaultResultSetHandler。java:294) at org。apache。ibatis。executor。resultset。DefaultResultSetHandler。handleRowValues(DefaultResultSetHandler。java:269) at org。apache。ibatis。executor。resultset。DefaultResultSetHandler。handleResultSet(DefaultResultSetHandler。java:239) at org。apache。ibatis。executor。resultset。DefaultResultSetHandler。handleResultSets(DefaultResultSetHandler。java:153) at org。apache。ibatis。executor。statement。PreparedStatementHandler。query(PreparedStatementHandler。java:60) at org。apache。ibatis。executor。statement。RoutingStatementHandler。query(RoutingStatementHandler。java:73) at sun。reflect。GeneratedMethodAccessor200。invoke(Unknown Source) at sun。reflect。DelegatingMethodAccessorImpl。invoke(DelegatingMethodAccessorImpl。java:43) at java。lang。reflect。Method。invoke(Method。java:606) at org。apache。ibatis。plugin。Plugin。invoke(Plugin。java:62) at com。sun。proxy。$Proxy583。query(Unknown Source) at org。apache。ibatis。executor。SimpleExecutor。doQuery(SimpleExecutor。java:60) at org。apache。ibatis。executor。BaseExecutor。queryFromDatabase(BaseExecutor。java:267) at org。apache。ibatis。executor。BaseExecutor。query(BaseExecutor。java:137) at org。apache。ibatis。executor。CachingExecutor。query(CachingExecutor。java:96) at org。apache。ibatis。executor。CachingExecutor。query(CachingExecutor。java:77) at org。apache。ibatis。session。defaults。DefaultSqlSession。selectList(DefaultSqlSession。java:108) at org。apache。ibatis。session。defaults。DefaultSqlSession。selectList(DefaultSqlSession。java:102) at sun。reflect。GeneratedMethodAccessor210。invoke(Unknown Source) at sun。reflect。DelegatingMethodAccessorImpl。invoke(DelegatingMethodAccessorImpl。java:43) at java。lang。reflect。Method。invoke(Method。java:606) at org。mybatis。spring。SqlSessionTemplate$SqlSessionInterceptor。invoke(SqlSessionTemplate。java:354) 。。。 56 more Caused by: java。sql。SQLException: Unknown error%!(EXTRA string=WritePacket: write header failed: write tcp 10。20。1。70:41708->10。20。11。211:3306: write: broken pipe) at com。mysql。jdbc。SQLError。createSQLException(SQLError。java:1078) at com。mysql。jdbc。MysqlIO。checkErrorPacket(MysqlIO。java:4187) at com。mysql。jdbc。MysqlIO。checkErrorPacket(MysqlIO。java:4119) at com。mysql。jdbc。MysqlIO。sendCommand(MysqlIO。java:2570) at com。mysql。jdbc。MysqlIO。sqlQueryDirect(MysqlIO。java:2731) at com。mysql。jdbc。ConnectionImpl。execSQL(ConnectionImpl。java:2809) at com。mysql。jdbc。ConnectionImpl。execSQL(ConnectionImpl。java:2758) at com。mysql。jdbc。StatementImpl。executeQuery$original$Sl6PNbeh(StatementImpl。java:1612) at com。mysql。jdbc。StatementImpl。executeQuery$original$Sl6PNbeh$accessor$ExoGThK4(StatementImpl。java) at com。mysql。jdbc。StatementImpl$auxiliary$Lb6xbzuH。call(Unknown Source) at org。apache。skywalking。apm。agent。core。plugin。interceptor。enhance。InstMethodsInter。intercept(InstMethodsInter。java:93) at com。mysql。jdbc。StatementImpl。executeQuery(StatementImpl。java) at com。mysql。jdbc。ConnectionImpl。isReadOnly(ConnectionImpl。java:3930) 。。。 103 more

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新闻中心

氢氧化镁在各行业的广泛应用

作者:
来源:
发布时间:
2019-05-21

稀酸还有就是铵盐溶液,氢氧化镁是一类具有碱性的物质,可以用作分析试剂,还用于制药工程工业上,在各个方面用氢氧化镁也比较多,下面我们一起来看看氢氧化镁的功效还有作用吧。
  1.氢氧化镁在环保上应用广泛,因为氢氧化镁可以用作中和剂,它呈现碱性,并且由于吸附性好,可以用来处理含酸的废弃,以及一些废水处理,含有重金属和有机物的废水处理可以用氢氧化镁。
  2.氢氧化镁也用于阻止燃烧,它是一种阻燃剂,因为氢氧化镁的热分解温度高,范围宽,比其他的无机阻燃剂都要高,所以有良好的阻燃效果。
  3.氢氧化镁也用在化工产业上,主要集中在油漆,涂料,还有耐火砖,磁材,陶瓷以及做添加剂或者是填料在使用,因为氢氧化镁可以增加耐磨,降低熔点,起到让金属的晶格更加细密的作用。

电线电缆具有输送能源、传递信息的重要作用,在国民经济中占有极其重要的地位。近年来,通信行业的快速增长给电线电缆行业创造了市场需求,同时也将逐步带动电线电缆行业产品结构的调整。与此同时,核电站、地铁、汽车、造船、煤矿、建筑等领域的电线电缆需求也十分旺盛。
  对于阻燃电缆料,对其在加工工艺中使用的阻燃剂和其他助剂在环保方面提出了更高的要求。电线电缆在生产和使用过程中,对环境的影响越来越受到重视,因此,氢氧化镁阻燃剂在电缆中的应用将会带动市场发展空间。

案例展示 CASE

江苏福彩 甘肃快3 江苏福彩 江苏福彩 甘肃快三 江苏福彩 甘肃快三 江苏福彩 星空彩票 江苏福彩